6XC Loads

Aug 7, 2014
742
43
28
Gillette, WY
#4
Norma Brass
Berger 105 Hybrid (Moly) jumped .012"
38.9gr VV N550
210M
3120 fps 27" barrel

^^ Low pressure load
RL 17 will produce the most speed for you with less pressure, no guarantee accuracy wise.
 
Mar 16, 2017
132
23
18
#5
I use the 115 dtacs over 40.5 grains on H4350 and get 2,950 FPS in my AI AX barrel. No pressure signs or anything.

It is a bit slower than I would like but getting up to 3,000 FPS really is not going to change anything.

The DTACs are amazingly consistent as well.

Guys are getting more speed out of the RL powders though.
 

RoterJager

The Red Hunter
Oct 21, 2013
532
65
28
The Frozen Tundra
#6
Started load development today:

H4350 38.1gr-39.9gr in 0.2gr increments.
CCI BR2
Berger 105 Hybrids
Length to Ogive- 2.19"
COAL- 2.79"

I'll have results on sometime on Thursday.
 

RoterJager

The Red Hunter
Oct 21, 2013
532
65
28
The Frozen Tundra
#7
Load development worked pretty well. 6xc is stupid accuracte. Probably going to go with 39.7 to start. It's a slightly larger vertical group than the 38.9, but it's faster and my barrel was really starting to heat up by the time I got to 39.7. I'm only getting 2920fps out of it but I think it'll speed up a bit when I get some more rounds on the barrel.
 

Attachments

Feb 22, 2013
379
61
28
Milwaukee, WI
#8
IMO it's a waste of time to do load development before putting some rounds down the barrel. Finding a load that the barrel likes at round #50, then hoping/assuming it will speed up AND still be in tune seems a bit backwards. Shoot 100 mild practice loads, if the barrel speeds up it "should" be done, then start your load workup.

Also, there's no need to do 0.2gr increments for a ~40gr load. 0.3 or 0.4gr will be fine to accomplish the OCW, you'll waste less time and components, and you'll be able to fine tune in the next step.

Any pressure signs? I like to load beyond what I think max pressure will be, since you never know with that barrel/powder/bullet what the max will be. It's easier to stop when you see pressure and pull the rest of the bullets when you get home than it is to wonder if you could've pushed it further and you have lower than expected velocity...then make another range trip for mini-OCW #2. Ask me how I know LOL
 

RoterJager

The Red Hunter
Oct 21, 2013
532
65
28
The Frozen Tundra
#9
Don't have time for that. I only have a week to get things ready for the grind. No pressure signs. Groups are all roughly where I want them to be. If it speeds up over the next 50, great. If not, I'm perfectly content with 2920-2950. i'll be doing a true load work up this winter.
 
Feb 22, 2013
379
61
28
Milwaukee, WI
#11
Who cares what everyone else is using? If you're not seeing pressure signs, who's to say you couldn't go another 0.5gr or more higher to get 3000fps?

I've had slow lots of powder that didn't match up with data online...

The 0.3gr is just a suggestion to save time, components, and hopefully confusion with the OCW. Instead of 10 5-shot strings to cover only 1.8 total grains, why not 8 5-shot strings that cover 38.4-40.5? If you graph the velocity you should see a flat spot that correlates to your accuracy node. If you run into pressure then stop and pull the bullets. If you were shooting a 338 Lapua with 90gr of powder, would you still use 0.2gr increments?
 

RoterJager

The Red Hunter
Oct 21, 2013
532
65
28
The Frozen Tundra
#13
Who cares what everyone else is using? If you're not seeing pressure signs, who's to say you couldn't go another 0.5gr or more higher to get 3000fps?

I've had slow lots of powder that didn't match up with data online...

The 0.3gr is just a suggestion to save time, components, and hopefully confusion with the OCW. Instead of 10 5-shot strings to cover only 1.8 total grains, why not 8 5-shot strings that cover 38.4-40.5? If you graph the velocity you should see a flat spot that correlates to your accuracy node. If you run into pressure then stop and pull the bullets. If you were shooting a 338 Lapua with 90gr of powder, would you still use 0.2gr increments?

Its ts too late to do it any other way before the grind. Doing 0.3gr increments will have to wait until after the season then I can try other powders as well. Switching calibers this late wasn't in the plan.

i would do 0.2gr on the .338L because I prefer not to rearrange my facial features.
 

BWB

Sergeant
Mar 18, 2009
319
6
18
SD
#15
The lot of H4350 I was running last year gave me pressure signs with 39.8 grains, settled on a 39.4 load to run. The lot of H4350 I was running this year, I didn't have pressure until 41.0 grains and settled on a 40.0 load to run...

Stopping before pressure signs because the internet says so, is only putting you at your own disadvantage. That 40.0 load was getting me 3060 fps after 200 rounds were on the barrel, I saw velocity increases all the way to 200 rounds on both barrels this year.

If you're running H4350 with 105-108 grain bullets, start at 38.5 and work your way up.
 
Feb 22, 2013
379
61
28
Milwaukee, WI
#21
Everything I've read/heard said the 110 SMKs are a no-go in an 8 twist. When ordering from Bartlein, Frank said a 7.5 twist should work but I went with a 7.25 twist to play it safe (I'm planning on shooting the 110 SMKs exclusively).
 

RoterJager

The Red Hunter
Oct 21, 2013
532
65
28
The Frozen Tundra
#22
Everything I've read/heard said the 110 SMKs are a no-go in an 8 twist. When ordering from Bartlein, Frank said a 7.5 twist should work but I went with a 7.25 twist to play it safe (I'm planning on shooting the 110 SMKs exclusively).
The guys in the "Rifle Snobs" group seem to think they will work if I can push them into the 3000fps range which is totally doable. My Second Edition of Applied Ballistics bullet library doesn't have the 110s listed.

That being said I can push the 105s faster and still have a decent G7 BC, only downside being that they are $20/500 more than the 107 SMKs.
 
Feb 22, 2013
379
61
28
Milwaukee, WI
#23
The stability is still only 1.3 - which is in the marginal range - when the 110 SMK is pushed to 3100fps out of an 8 twist. I think anything much more than 3050fps in a 6XC is a pipe dream.

You'll have to run the numbers on the 107 SMK but the 105 Hybrids should be gtg.
 

mpk1996

Full Member
Apr 25, 2013
454
38
28
#26
Everything I've read/heard said the 110 SMKs are a no-go in an 8 twist. When ordering from Bartlein, Frank said a 7.5 twist should work but I went with a 7.25 twist to play it safe (I'm planning on shooting the 110 SMKs exclusively).
I have an 8 twist in both 6xc and 6 creed. it shot the 110 ok, but not as good as the 105g bergers, and not as good as my last barrel, which was a 7.5 twist. I know guys have been ok with the 8, but I won't run them again in anything slower than a 7.5. YMMV
 

djskit

Sergeant
Jun 3, 2008
568
0
16
50
Roseville, CA
#27
I was shooting 110 SMK's in the 3000 fps range and they worked great in my 7.5 twist barrel until I shot in a DA of (500) and it went to shit at 1,000 yards. Couple weeks earlier at DA of 500 it shot fine.
 
Aug 9, 2012
103
14
18
45
#29
Just getting into the 6XC. What kind of velocities have yall been getting with the 110s and H4350? I have a 7.5 twist so should be fine.
 

mpk1996

Full Member
Apr 25, 2013
454
38
28
#30
6XC
1:8 Bartlein Barrel - Gradous
39.6g H4350
105g Berger Hybrid - .015" off
CCI BR2
Alpha LRP 6XC Brass
3045 FPS
 

Baner

Private
Feb 23, 2017
34
9
8
#32
26" 1:7" Hardy carbon 6XC.
Norma brass.
Federal 210.
H4350 39.5gr
110 gr SMK.
Around 3000 fps.
COAL 71mm due to mag length.

Can push it a bit higher, no signs of high preassure, But the speed is okay and the accuracy and ES is great.
 
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