Long Range - Hit Probability Analysis

Jan 9, 2011
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OKC
.5 MOA 6mm - 105 - 2950 - 47% Hit - 9.9Lbs. of RECOIL
View attachment 6888176

.5 MOA 6.5mm - 147 - 2750 - 68% Hit - 13.58Lbs. of RECOIL
View attachment 6888182


.5 MOA 7mm - 180 - 2550 - 69% Hit - 15.94 Lbs. of RECOIL
View attachment 6888180
Yeah I don't think anyone will disagree a heavier bullet at long range has a higher probability. It's a balance that 7mm would be viable in a OK (where I live) comp that stretches out a ways. But a 6.5 might be the best compromise still in that scenario. I'm not recoil sensitive but since I started shooting positional stuff more recently I've started to understand why people do 6mm.
 
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Sep 1, 2011
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Rockwall, TX
Yeah I don't think anyone will disagree a heavier bullet at long range has a higher probability. It's a balance that 7mm would be viable in a OK (where I live) comp that stretches out a ways. But a 6.5 might be the best compromise still in that scenario. I'm not recoil sensitive but since I started shooting positional stuff more recently I've started to understand why people do 6mm.
I understand. I was doing this to see the big picture not for PRS. I think for me a 7mm SAUM that I could use with 2600 FPS Loads up to 3100FPS loads would just be a great all around setup. I am not a PRS shooter so it was nice to get feedback from everyone.
 
Nov 5, 2013
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I understand. I was doing this to see the big picture not for PRS. I think for me a 7mm SAUM that I could use with 2600 FPS Loads up to 3100FPS loads would just be a great all around setup. I am not a PRS shooter so it was nice to get feedback from everyone.
i think a 7 saum is an awesome all around caliber than can be configured to run well in many scenarios...run light and fast for smaller game, load it heavy for long stuff or big animals, still has great ballistics without stupid amounts of recoil...short mags are sexy
 
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Jan 9, 2011
413
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OKC
I understand. I was doing this to see the big picture not for PRS. I think for me a 7mm SAUM that I could use with 2600 FPS Loads up to 3100FPS loads would just be a great all around setup. I am not a PRS shooter so it was nice to get feedback from everyone.
Yeah I think it's a great choice! Down loading to 2600 may reduce the consistency a but with a light case fill but def should fine a good medium load for all around then can hot rod if needed for like elk or something.
 

TripleBull

This one goes to 11
Feb 13, 2017
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Have you run the numbers on 375 Lethal Magnum? Specs are 3500fps @ 350 grain and 3200 fps @ 400 grain (Cutting Edge, but not sure which the AB crew are running, probably something different than below)

CE1.png

CE3.png
 

Rthur

Philomath
Apr 16, 2010
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I understand. I was doing this to see the big picture not for PRS. I think for me a 7mm SAUM that I could use with 2600 FPS Loads up to 3100FPS loads would just be a great all around setup. I am not a PRS shooter so it was nice to get feedback from everyone.
7 saum does a lot well inside 1200 for case capacity/caliber.

R
 
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Rthur

Philomath
Apr 16, 2010
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What would you recommend for 180 ELDMs?

I will be loading mag length in a short action.
For out to 1200 I'd go 162 eld-m/saum and with the right reamer you would be around 2.950 COAL or under.
I'll push it over 3k without running it very warm on load.
Accurate mag has a wsm/saum mag that will hold 7 for this.
The 180 is better served in a action that can handle a COAL 3.100 and mag as well.
Surgeon used to make a "medium" action as I've built one for a friend. FB was .188 on that reamer.
The 180 can be ran in a sa but case capacity is lost.

R
 
Jan 9, 2011
413
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OKC
For out to 1200 I'd go 162 eld-m/saum and with the right reamer you would be around 2.950 COAL or under.
I'll push it over 3k without running it very warm on load.
Accurate mag has a wsm/saum mag that will hold 7 for this.
The 180 is better served in a action that can handle a COAL 3.100 and mag as well.
Surgeon used to make a "medium" action as I've built one for a friend. FB was .188 on that reamer.
The 180 can be ran in a sa but case capacity is lost.

R
Defiance has a rebel XM and a BDL bottom metal that gives length up to 3.2". I'm thinking this would be excellent for a 7 saum with 180. Maybe even 195? Maybe not able to push that hard enough. Hunting build that is since no detach mag.
 

Sheldon N

Blind Squirrel Finds a Nut
Sep 24, 2014
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Pacific Northwest
Brass cost/availability along with sizing die options is your biggest factor in picking one of the 7's. The SAUM is cheapest/most available but the WSM's and WSM derivatives will give you more case capacity.

While it's better to have the bullet seated clear of the neck/shoulder junction that's not really possible in a mag fed short action. They will shoot fine with the bullet down in the case too. I shot a 7 SAUM mag fed with Berger 195's. The bullet was darn near sitting on the primer but it shot fine, lol.

RL-26 powder is your friend.
 
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