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5/29/2026 4:28:14 PM EDT
Now that Michigan has removed the limited firearm zone I want to deer hunt this year using my LMT MARS-H in 6.5 Creedmoor.  Never shot it much but want to take it out and use it.  I don't reload so I'd need to be able to use factory ammo.  I prefer high BC bullets and from what I understand some of those won't fit in the AR-10 mags.  I have all PMAG SR25 M118LR mags for it.

I've read the Berger 156gr are a no-go in AR-10s due to the bullet length.  Not sure about the Berger 140s.  Will the Hornady ELD-X fit fine in a SR25 mag?  I'd also be open to purchasing mags that could accept longer bullets (not sure if Lancers do).  Any help would be greatly appreciated.
5/29/2026 5:59:59 PM EDT
[#1]
AR-10 Pmags have a max OAL of 2.83”, Hornady loads the ELD-X/M to 2.8” I believe. But your BC is truly not going to matter at the ranges that you’ll likely be shooting deer. Longest shot I’ve taken so far in Michigan is ~360yds. BC won’t really have an impact until you’re out past 600 or so and that’s beyond the capabilities of 99.9% of hunters.
8/3/2026 4:58:28 PM EDT
[#2]
BC effects wind deflection at 100y and up.

Hornady 6.5 ELDM and ELDX fit in my AR10 PMAGs. 140, 143, and 147 all fit.
8/3/2026 5:37:35 PM EDT
[#3]
I thought the cool kids went to the lighter bullets. 130’s maybe?

Usually I just say to find the best shooting load.
BikerNut:
Normal people like motorcycles. Real people like motorcycles.

People who don't like motorcycles are just... weird.
8/7/2026 6:53:44 PM EDT
[Last Edit: 135Patriots][Edited] [#4]
Originally Posted By Zeebz:

I've read the Berger 156gr are a no-go in AR-10s due to the bullet length.
View Quote

I just stuck a few factory 156gr into a SR pattern Duramag and there’s absolutely room for them. I’ll try them out in a LR118 pmag tonight.

COAL for the 156gr Berger loading
Attached File

COAL for LR118 308 as a point of comparison
Attached File


Fits in both a 118 pmag and a Duramag, the latter is downright roomy. If it’ll seat in the Criterion barrel I have on the way I’ll send it. I don’t see why it wouldn’t work.
Attached File

Attached File

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