Having a difficult time deciding on a long action long range cartridge.

Retvet2009

Specialist
Apr 20, 2014
30
5
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Missouri
#1
I have been going through different cartridges that would be suited for LR/ELR. The ones I have considered are

260 AI/Terminator
6.5-06 AI
6.5 WSM/SAUM
7MM/300 MAG
7MM Ultra mag
28 Nosler
338 Edge
338 Lapua mag

The fly in the ointment is which of these are less likely to have the least OAL and feed issues from an AICS type magazine? I'll close this by saying it's very possible I'm over thinking this and none of them may present any problems. I would rather have those that have more experience tell me I'm over thinking it and just pick one than go in blind. Thanks in advance!
 

W54/XM-388

Online Training Member
Oct 1, 2005
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#6
.300 PRC would be a nice entry level
.300 Norma would be the higher energy version
.338LM is more for getting energy delivered on target than strictly target shooting, but works well also.
 
Feb 24, 2012
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#10
You've picked options from all over the spectrum, but every one of your picks is some specialty wildcat. Just buy a 7 mm rem mag and enjoy the availability of factory ammo, moderate recoil and great ballistics.
 
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408w

Private
Sep 8, 2017
68
14
8
Western ny
#14
If elr shooting to you
is 1000yrds go with a 6.5 mm variant
Is 1000-1760yrs go 7mm or 30 cal
Beyond that 338 and up

Yes, there are exceptions to this very basic opinion
There are hot versions of every caliber that goes into the next category.
These are my basic rules of thumb for the sake of reliable high hit performance
 
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BurnOut

DDOJSIOC
Nov 24, 2013
1,103
163
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Dallas
#15
I’d very much like a 7-300PRC should it ever become available.
It is available, it's called the 7 LRM. Gunwerks developed it (AFAIK), but there are plenty of places to get one built.

Edit: Actually, the above info isn't quite accurate; it looks like the 300 PRC has a case length of 2.58x" while a quick measuring of a couple of my own 7 LRM cases at ~2.52x. Nevertheless, the 7LRM is capable of launching the Berger and Sierra heavies at around 2950 in a 26" 8-twist barrel.
 
Last edited:
Feb 11, 2017
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#16
It is available, it's called the 7 LRM. Gunwerks developed it (AFAIK), but there are plenty of places to get one built.

Edit: Actually, the above info isn't quite accurate; it looks like the 300 PRC has a case length of 2.58x" while a quick measuring of a couple of my own 7 LRM cases at ~2.52x. Nevertheless, the 7LRM is capable of launching the Berger and Sierra heavies at around 2950 in a 26" 8-twist barrel.
IMG-20181024-WA0001.jpeg

This is what another bloke posted up for the 7LRM vs the 300PRC.

7LRM would be a nightmare to organise for me because I'm in Aus, a 7-300PRC reamer would surely be an easier option. It took me long enough to get my 7mmSAW reamer sent here.
 

BurnOut

DDOJSIOC
Nov 24, 2013
1,103
163
63
Dallas
#17
7LRM would be a nightmare to organise for me because I'm in Aus, a 7-300PRC reamer would surely be an easier option. It took me long enough to get my 7mmSAW reamer sent here.
Fair enough... looking at that pic, it certainly seems like the 7-300 PRC would have a bit more steam than the 7 LRM. Good stuff, let us know if you build one!
 

Bradu

Full Member
Aug 24, 2011
1,990
253
83
IL
#18
Not sure how far you are planning to shoot but I like the 7mm or 30 caliber for long range. Less recoil and in many cases better ballistics out to a mile than some of the bigger calibers.
 

fdkay

Gunny Sergeant
Nov 27, 2009
3,722
399
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Ingleside, Tx
#19
I think you would likely have an easier time with the 7-.300 wm.
Good brass is easily sourced, and I know folks are shooting it down under, so a reamer might be locally sourced, it is a terrible barrel burner though.
 
Feb 11, 2017
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#23
I think you would likely have an easier time with the 7-.300 wm.
Good brass is easily sourced, and I know folks are shooting it down under, so a reamer might be locally sourced, it is a terrible barrel burner though.
This isn’t a bad idea. RWS brass would be perfect for that.
 

THEIS

Sergeant of the Hide
Nov 27, 2017
1,263
1,972
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#30
ugghhhh but that belt....
Hi,

Well just go back to the original 6.5 Lapua Magnum :)
If Lapua would reintroduce that in today's market it would be way more accepted than back in their T&E days of it.

Sincerely,
Theis
 

Kickin45

Sergeant of the Hide
Oct 7, 2018
140
41
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#33
I love for the good ol tried and true 300WM? It’s a proven 1mile cartridge as is.
With today’s bullets, especially the hybrids, 1500yds is easily in its spectrum. And that doesn’t even include loading your own hot rounds.
 

THEIS

Sergeant of the Hide
Nov 27, 2017
1,263
1,972
113
#35
Would we have a 300 Norma if the 300 Lapua would have reappeared 10 years ago?
Hi,
I personally doubt that it would be. It would have been way harder for Jimmie and Norma to bring it to market share with Lapua having such history and head start in the market. But maybe with General Dynamics help they might have been able to pull it off!!

Sincerely,
Theis
 

DAVETOOLEY

Gunny Sergeant
Jun 14, 2009
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Oriental, North Carolina
#36
Hi,
I personally doubt that it would be. It would have been way harder for Jimmie and Norma to bring it to market share with Lapua having such history and head start in the market. But maybe with General Dynamics help they might have been able to pull it off!!

Sincerely,
Theis
I asked for it twice, at the start of the first PSR solicitation and again after that collapsed. I got told no. Oh well the rest is history. Happy for Jimmie.
 
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goatboy

New Hide Member
Sep 23, 2018
68
28
18
#37
given a choice between two similar cartridges, one with a rebated rim and one without, i would always choose the one without.
Same goes for a belt.
I’m not knowledgeable on this, what are the issues with belts and rims?

Many thanks,
g
 

W54/XM-388

Online Training Member
Oct 1, 2005
3,043
2,839
113
Dallas, TX
#39
Easy to do. Might be what I do today is design and order a 7-300PRC reamer.
On second thought I need a couple of the new heavy bullets available before I start.
Can anyone help?
If you find some you like, available on the market. send me a PM with where to order them from and I'll order some and have them shipped to you.
The Warner 151gr flatlines are not really heavy, but it would be interesting to see how they would do for target shooting, in addition to the ones in the 180gr and up range.

If the project turns out well, I'd be interested in ordering an AXMC barrel for it to test how I like it, before I decide on having a rifle built for it or a .300 PRC.
 
Jun 11, 2017
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#45
PRC about 100 FPS slower and costs 40% less than the Norma.
300NM is 179% the cost of 300PRC and is 40fps faster.

$41.80 for 300PRC factory Hornady 225gr ELD at Centerfire Hornady rates them at 2810fps

$74.99 for 300NM factory Hornady 225gr ELD at Selway Hornady rates them at 2850fps

$74.99 ÷ $41.80 = 179.4%
 

fdkay

Gunny Sergeant
Nov 27, 2009
3,722
399
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Ingleside, Tx
#46
300NM is 179% the cost of 300PRC and is 40fps faster.

$41.80 for 300PRC factory Hornady 225gr ELD at Centerfire Hornady rates them at 2810fps

$74.99 for 300NM factory Hornady 225gr ELD at Selway Hornady rates them at 2850fps

$74.99 ÷ $41.80 = 179.4%
What is the barrel length and atmospherics for the the velocities given?

Sorry, if Dave Tooley says 100 fps difference, I'm going with him, as he likely comparing apples to apples.
 
Jul 29, 2014
1,032
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#47
What is the barrel length and atmospherics for the the velocities given?

Sorry, if Dave Tooley says 100 fps difference, I'm going with him, as he likely comparing apples to apples.
either way, it's not much considering the extra cost for brass powder boltface etc etc
 
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DAVETOOLEY

Gunny Sergeant
Jun 14, 2009
1,297
246
63
68
Oriental, North Carolina
#48
What is the barrel length and atmospherics for the the velocities given?

Sorry, if Dave Tooley says 100 fps difference, I'm going with him, as he likely comparing apples to apples.
I know what Hornady loads for their tier 1 customer. Civilian ammo will be slightly slower. Probably about 3K PSI worth. Handloaders will exceed both. It's what we do then we complain about brass life. I know the load for the 300 Norma w/215's for SOCOM. It will vary from lot to lot but the difference is around 100 FPS.
 
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jwknutson17

Big Game Hunter
Apr 29, 2017
1,002
136
63
#49
I am giving the 300 PRC a go and have no plans to give up my 300 Norma.

Have 10 boxes of Hornady 300 PRC at the house and will shoot that before beginning some hand loads with it. The Hornady brass will get me by til Peterson/ADG/Lapua comes out with some. Figure I get 5 or 6 good reloads out of the brass. And that will be plenty for now. If I get into 7 reloads and 1400-1600 rd count, I'll be probably spinning up a new barrel when the brass comes out anyway.