6mm long range predator gun build

Pcola

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I am looking to build a 6mm long range predator rifle for Western states but want it to have a 20 inch barrel because I have a suppressor and want overall length under 30. I am just starting to reload so 243 make me feel comfortable because it's so established. Is there anything else I should be looking for
 

6brshooter

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What bullet weight are you wanting to run? I've got a 20" 8tw 243, 75gr blitzkings are at 3450 and 107smk are 2925. If you want a shorter barrel like that, I'd look into a more efficient case design like 6x47 or 6dasher.
 
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6brshooter

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What bullet weight are you wanting to run? I've got a 20" 8tw 243, 75gr blitzkings are at 3450 and 107smk are 2925. If you want a shorter barrel like that, I'd look into a more efficient case design like 6x47 or 6dasher.
 
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Big Sneaky

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I’m running 87 gr Berger VLD’s at 3150 FPS. Rem 700 243 with a 21” barrel TBAC can. It’s a coyote smacker for sure. You also might look into the 6 Creedmoor Couple guys around here using them on coyotes with good luck.
 
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bmash

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When building a rifle I decide on bullet weight first so my chamber can be cut for that weight. This will allow you to get the bullet to the lands. If 107 you may not be able to get a 70 to reach the lands, I went with a 70gr build and a twist to optimize the lighter bullets. I can shot up to 80gr but not the 100 range bullets.
I built a 6x47 Lapua but that requires neck sizing so you may not want that. Obviously the 243 is great. Whatever you pick make sure you can get quality brass.
 
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Sheldon N

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What is your definition of "long range?"

That's gonna be a big factor for helping you figure out your question.
So true. Got a buddy who hunts yotes in eastern WA with 28 Nosler and 195 Bergers. I think 1500 or 1600 is the longest kill I've seen from his videos, pretty sure he's gonna get that 1 mile kill sometime this year. :)
 

steve123

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6x47L has ready made brass available now through Peterson if that might sway your decision.

I know from experience that Lapua brass is super strong stuff! Experimenting with R17 I was able to crank 95gr SMK's to 3500 fps in a 28" barrel before the bolt got sticky, the primers were just getting flat, and the brass still held a primer. I wouldn't suggest anyone try this though as pressures must have been super high. 3300 fps the pressure signs on the brass were normal.

I played with Sierra's 90gr TMK in my 6mmBR and the high node in a 26" was 3196. That bullet would be a great consideration for yotes and normal long range and could be cranked out 200 fps faster in a bigger cartridge.
 
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xdeano

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Just about any of the larger 6mm cartridges will work just fine. I know a few guys running 243's, 243AI, 6xc, 6creed, 6SLR, 6x47L, etc. They all work with correct bullet.

You really need to tell us what "long range" is though to you. I will say that most bullets don't open up consistently past 600yds on coyotes, because of their thinner skin and bone structure. Inside 600yds you'll do great. I've been running the 105 Berger Hunting VLD for coyotes in a 6SLR and it's a decent bullet.

Another question is; are you saving the hides for resale or are you just putting holes in them? If you're just putting holes in them then the sky is the limit on what bullet you want to sling at them. If you're looking for a "fur" bullet then the choices decrease.

Steve123, might be on the right track with the 90grn Sierra TGK, they make a 95g TMK also. I've shot the 77 TMK out of a 22-243 and it's a wicked hard hitting round for coyotes. 3500FPS is easily achieved. I know a couple of guys who love the 69grn TMK out of their 223.

xdeano
 
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MakeSawdust

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^^^Pick xdeano's brain a little. He helped me out a ton with this a few years ago on accurate shooter. What he said was dead on. I think he's killed a semi side dumper load full of coyotes with a 6mm, maybe more.
 
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Travis224

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I did alot of research, and about the only way to get some of the shorter bullets to get close to the lands is to have a reamer reground to shorten the freebore. I hunt at night and with using my Halo LR thermal, I can easily take 400-500yd shots and I felt needing a bit more oomph was necessary. Right now I'm using a 6x45 (6mm223) and am looking to get about 400-500fps for the long shots. Reamer shows up in a week and will be putting it together.

Fyi, my buddy runs a .243 with 16" barrel and was right at 3750fps with 58 grain vmaxes. I'm hoping I can get 65vmaxes at 3500.

Good luck, best thing is to decide on your ranges and pick bullets and build around that first
 
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Pcola

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What bullet weight are you wanting to run? I've got a 20" 8tw 243, 75gr blitzkings are at 3450 and 107smk are 2925. If you want a shorter barrel like that, I'd look into a more efficient case design like 6x47 or 6dasher.
I would like to run 80-90 grains ideally
 

Pcola

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Feb 20, 2020
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What bullet weight are you wanting to run? I've got a 20" 8tw 243, 75gr blitzkings are at 3450 and 107smk are 2925. If you want a shorter barrel like that, I'd look into a more efficient case design like 6x47 or 6dasher.
I would like to be 80-90 grain bullets
 

Pcola

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Feb 20, 2020
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What is your definition of "long range?"

That's gonna be a big factor for helping you figure out your question.
400 yards I have seen mountain lions while calling and just want something that if that chance comes again I can even hammer one at that distance
 

Pcola

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Feb 20, 2020
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When building a rifle I decide on bullet weight first so my chamber can be cut for that weight. This will allow you to get the bullet to the lands. If 107 you may not be able to get a 70 to reach the lands, I went with a 70gr build and a twist to optimize the lighter bullets. I can shot up to 80gr but not the 100 range bullets.
I built a 6x47 Lapua but that requires neck sizing so you may not want that. Obviously the 243 is great. Whatever you pick make sure you can get quality brass.
What twist rate should I be looking at for 80-90 grain bullets?
 

Pcola

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Just about any of the larger 6mm cartridges will work just fine. I know a few guys running 243's, 243AI, 6xc, 6creed, 6SLR, 6x47L, etc. They all work with correct bullet.

You really need to tell us what "long range" is though to you. I will say that most bullets don't open up consistently past 600yds on coyotes, because of their thinner skin and bone structure. Inside 600yds you'll do great. I've been running the 105 Berger Hunting VLD for coyotes in a 6SLR and it's a decent bullet.

Another question is; are you saving the hides for resale or are you just putting holes in them? If you're just putting holes in them then the sky is the limit on what bullet you want to sling at them. If you're looking for a "fur" bullet then the choices decrease.

Steve123, might be on the right track with the 90grn Sierra TGK, they make a 95g TMK also. I've shot the 77 TMK out of a 22-243 and it's a wicked hard hitting round for coyotes. 3500FPS is easily achieved. I know a couple of guys who love the 69grn TMK out of their 223.

xdeano
That was wrong of me not to post desired distance I feel comfortable shooting out to 400-500 hopefully hit that 600 comfortably. And I would like to save pelts especially because in the hills I hunt there are all types of cats but for coyotes I could care less I am just trying to become as proficient as possible on small game to make large game shots easier.
 
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xdeano

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I would like to be 80-90 grain bullets
If youre going to run the 80-90 grn bullets and want to save hides, I had really good luck with;
Sierra 85grn spt flat base
Sierra 85grn hpbt
Hornady 87grn hpbt

The 90grn bergers blew huge holes.

You might want to try the sierra 90grn tmk. I have not tried this projectile so I cant tell you how it'll perform.

Smk usually fare pretty well also, but can have a tendency to pencil through.

Id Stearns you away from a vmax because they can have a tendency to splash at close range and high velocities. I'd push you towards a nosler as they have thicker jackets and a thicker base. Better bullet.

Again the sky is the limit. If you want to try a copper bullet hit up lehigh defense for a 62grn controlled chaos.

If you want to blow big holes there are bullets for that also. This time of year "not prime" just go load up a bunch of different bullets and go try them out. Youre not out any. Heck I'll be trying out the Atips here pretty quick if I ever get a moment to load them. Ive had others tell me they do very well on Coyotes also, quarter sized exits.

Xdeano
 
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Pcola

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If youre going to run the 80-90 grn bullets and want to save hides, I had really good luck with;
Sierra 85grn spt flat base
Sierra 85grn hpbt
Hornady 87grn hpbt

The 90grn bergers blew huge holes.

You might want to try the sierra 90grn tmk. I have not tried this projectile so I cant tell you how it'll perform.

Smk usually fare pretty well also, but can have a tendency to pencil through.

Id Stearns you away from a vmax because they can have a tendency to splash at close range and high velocities. I'd push you towards a nosler as they have thicker jackets and a thicker base. Better bullet.

Again the sky is the limit. If you want to try a copper bullet hit up lehigh defense for a 62grn controlled chaos.

If you want to blow big holes there are bullets for that also. This time of year "not prime" just go load up a bunch of different bullets and go try them out. Youre not out any. Heck I'll be trying out the Atips here pretty quick if I ever get a moment to load them. Ive had others tell me they do very well on Coyotes also, quarter sized exits.

Xdeano
Thank you for the advice I am excited to learn this and start taking further shots I generally hunt them with shotguns and hunt deer with rifles.
 

xdeano

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Cats are a whole different deal. They have super thin skin and will blow up easy.

4-600 is doable with the bullets that I mentioned above.

I typically like to go up to that 105 range to get a slight ballistic advantage, but you'll do fine.

For 80-90 you'll get away with a 9 twist.
95-105 you'll need an 8 twist.

Another bullet you might try is a Berger 88grn flat base varmint. I like boat tails for the bc but the flat base design seems to have better fur saving for some reason.

Xdeano
 

Pcola

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Cats are a whole different deal. They have super thin skin and will blow up easy.

4-600 is doable with the bullets that I mentioned above.

I typically like to go up to that 105 range to get a slight ballistic advantage, but you'll do fine.

For 80-90 you'll get away with a 9 twist.
95-105 you'll need an 8 twist.

Another bullet you might try is a Berger 88grn flat base varmint. I like boat tails for the bc but the flat base design seems to have better fur saving for some reason.

Xdeano
What range of bullets should I look at with a 1/10 twist rate?
 

xdeano

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You'll be fine with that 80-90 range. I was just giving you a cousion of error. Youre better overstabilizing a bit.

I was shooting the 80-90 in a 9.5t. But 10 should do ya.

I know for sure that if you go to the 95 bergers that you'll need a 9. I tried them in my 9.5 and they didnt work. They shot great in my 8 twist though.

Another bullet that I had good luck saving coyote hides was the 100grn Hornady spire point bt. They work great in factory gun and they worked well on deer.
Xdeano
 
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Pcola

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You'll be fine with that 80-90 range. I was just giving you a cousion of error. Youre better overstabilizing a bit.

I was shooting the 80-90 in a 9.5t. But 10 should do ya.

Xdeano
Awesome my uncle has a Tikka 243 I was thinking of building off of it has 5 rounds through it and my cousin didn't like it.
 

xdeano

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The 9.5t that i mentioned was a sako 243, basically the same as the tikka. The tikka shoot great and bolts are nice and smooth. There are a few things I'm not a huge fan of with them, but it'll kill Coyotes just the same. Id say burn the barrel up and spin a new one on.

Xdeano
 
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steve101610

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Jan 13, 2019
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I recently had a 6 creedmoor barrel spun up with a .109 freebore reamer and a 7 twist to shoot 110smk for coyote hunting. Just for shits I tried Some 90gr tgk and was very accurate with insane velocity. Ran them up to 3550fps and found my max charge. Backed them off to 3440fps out of a 26” barrel. Hoping to see what they do to coyotes this weekend.
 
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hollowoutadime

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Berger Varmint Bullets 88gr.
Hornady VMax 87 gr.
I'm shooting the Bergers 6br w/ 31.0gVarget 2989fps, sd=2 For me, they hoot a tad better than the 87gr Hornady's

Some of match/target bullets will require follow-up shots, I avoid them.
 

Subhunter2

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The 58gr and 87gr vmax are potent out of a 6 creed for yotes, i heard that some of these predator competition guys have been trying out the 6mm saum and they are basically zero holding for stupid distances, i dont know anything about the saum variant , but a 115 at 3300 or faster is insane! Especially when your pressed for making a shot
 
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Pcola

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Feb 20, 2020
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Berger Varmint Bullets 88gr.
Hornady VMax 87 gr.
I'm shooting the Bergers 6br w/ 31.0gVarget 2989fps, sd=2 For me, they hoot a tad better than the 87gr Hornady's

Some of match/target bullets will require follow-up shots, I avoid them.
Thank you
 

reubenski

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looks like a nice set up. specs?
xdeano
Zermatt Origin. HS Precision take off from a Rem Sendero rifle. HS Precision DBM. Henderson MLOk rail bedded flush in the forearm for quick attach/ detach of an Arca rail. Proof Sendero lite. Jewell trigger set at good. Hawkins Hybrid rings direct mount to receiver. March 3x24 just over 9lbs with the Ultra 5
 

Matt_3479

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I did up a 6mm creed with a 1:7.5 twist pushing the 105’s at 3130. Stupid accurate and a blast to shoot, coyotes don’t seem to be too fond of it DDCD0566-3BCF-43A1-AD7A-E8129880CE40.jpeg
 
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