Beginner Questions. MRAD vs. AI? 300NM vs. 300PRC vs. 338LM

richthe1

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Short Story:
(1) Which rifle? MRAD vs. AXMC vs. AXSR. Is there a downside to large firing pins, especially for the larger cartridges? I want to avoid pierced primers.

(2) Which Cartridge for out to 2000yds using only factory ammo? 300NM vs. 300PRC vs. any other? What twist rate? What factory ammo would you recommend? Should I also consider 338LM?


Long Story:
Max range I have access to is 2000yds. I will also be using this rifle In 6.5 Creedmoor for fun in some local PRS club matches (I know these rifles aren’t ideal for PRS, but I’m not a “gamer“). I am considering the following rifles:

MRAD
AXMC
AXSR

The biggest concern I have with the MRAD and AXMC is that they have large firing pins. Is this an issue? However, with the MRAD my understanding is the bolt is headspaced to its specific barrel, so maybe this remedies the issue? The army and SOCOM went with the MRAD in 300NM and the Navy is fielding some in 300 PRC, so it can’t be too much of an issue, right? Only thing holding me back from the AXSR is the cost of entry vs the other two options.

——300 NM vs. 300 PRC vs. 338LM——

My limited research showed 300 NM and 300 PRC are good options, with the 300NM having the advantage ballistically. One big caveat - I will only be shooting factory ammo. Also, I’d read 300NM might have an issue when shooting at angles? What would be my best choice? Are there any other cartridges I should consider?

What would be the best twist rate for 300 Norma? I’ve heard 1:10 is good, but the military is using 1:8? For 300NM I was looking at factory 215 Berger ammo. If I go with the MRAD I would likely be going with a fluted 26” barrel as that is what Barrett currently offers.

For 300 PRC it looks like a twist rate between 9 and 10 is recommended? Downside for the MRAD is it looks like they only offer 1:8 twists for their barrels.

I’d somewhat written off 338LM because it seems like many are moving away from it, but is it still something I should consider? Why or why not?

P.S. Is there much of a difference between the MRAD and the MK22? I know the MK22 trigger is a bit lighter and comes with a bag rider. Not sure if anything internal changed.
 

jasent

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How often do you plan to shoot at 2000? If not every outing then just flip a coin on the 300’s
 

Steel head

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    2000 and under?
    I’d go 300 prc all day and twice on Sunday because you indicated factory ammunition.

    Not sure about the 300NM and angles thing, sounds suspiciously like horse shit.
     

    jasent

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    2000 and under?
    I’d go 300 prc all day and twice on Sunday because you indicated factory ammunition.

    Not sure about the 300NM and angles thing, sounds suspiciously like horse shit.
    I think the angles thing comes with powders with poor case fill if I remember correctly
     

    Sig Marine

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    I can’t help you with the MRAD vs AXMC vs AXSR debate but I do shoot both the .300 Norma and the 300 PRC. For me, both rounds are pretty much equal out to 2000 yards so it comes down to this; if you reload go Norma if you’re going to shoot factory, go PRC. I shoot both using 225 ELD-Ms and velocities are within 20 fps of each other so ballistically it’s a tossup; Hornady factory PRC Ammo is relatively inexpensive and shoots very well.
     

    richthe1

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    How often do you plan to shoot at 2000? If not every outing then just flip a coin on the 300’s
    2000 and under?
    I’d go 300 prc all day and twice on Sunday because you indicated factory ammunition.

    Not sure about the 300NM and angles thing, sounds suspiciously like horse shit.
    Thanks for the responses!

    I read about the possible angle issue in this article:


    “ According to inside sources at Hornady, one of their motivations for coming to market with the 300 PRC was to avoid the unsafe conditions presented by the 300 Norma when shooting at angles. Apparently, the load density of the 300 Norma resulted in some inconsistent pressures.”

    So it sounds like it did come from Hornady, so they might be a bit bias...

    I plan to shoot 2000 about 4x/yr and 1,100-1,500 consistently about 24x/yr.
     

    richthe1

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    I can’t help you with the MRAD vs AXMC vs AXSR debate but I do shoot both the .300 Norma and the 300 PRC. For me, both rounds are pretty much equal out to 2000 yards so it comes down to this; if you reload go Norma if you’re going to shoot factory, go PRC. I shoot both using 225 ELD-Ms and velocities are within 20 fps of each other so ballistically it’s a tossup; Hornady factory PRC Ammo is relatively inexpensive and shoots very well.
    I didn’t realize 300NM and 300 PRC were so comparable at 2000yds. Does the 300NM beat the wind better than the 300PRC out to 2000? At what distance does the 300NM start to noticeably outperform the 300PRC?

    If I go with the MRAD, is a 1-8 twist too fast for a 26” 300 PRC barrel with 225 ELD-M? As I mentioned, I think that’s the only twist rate Barrett offers.
     

    Steel head

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    I didn’t realize 300NM and 300 PRC were so comparable at 2000yds. Does the 300NM beat the wind better than the 300PRC out to 2000? At what distance does the 300NM start to noticeably outperform the 300PRC?

    If I go with the MRAD, is a 1-8 twist too fast for a 26” 300 PRC barrel with 225 ELD-M? As I mentioned, I think that’s the only twist rate Barrett offers.
    That’s more with factory ammo.
    Reload 300NM and you’ll see it’s full potential.
     

    Blaster7Romeo

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    I had an MRAD sold it to get a good deal on an AXMC .. you can get cheaper caliber conversions with the AXMC if you are using the same bolt or mags you alredy have.. with every mrad kit you are stuck buying a bolt mag break and bag. With an AXMC yiu can just pick up a barrel that you want in the chambering you want from the maker you want.

    I like the AXMC stock better. But my baby hands liked being able to put the pistol grip I wanted in an mrad ( which you can do in the new asr)

    I dont know why but is seems like factory 300NM ammo is around the price of 338LM ammo . And 300 PRC ammo is just a little more that 300WM ammo .
     

    Sig Marine

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    I reload and get 2972 fps in the Norma and 2983 fps in the PRC. Using factory ammo in the PRC, speeds are around 2850 fps. So comparing the two is not apples to apples but at 2000 yards, the Norma at my reloaded velocity has a 1 mph wind error of 21.4” whereas the factory PRC at factory velocity has a 1 mph wind error of 23.3”, so basically the same. Both of my barrels are 30” with 1:9 twist.
     
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    GIXXER2000

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    I have never had an MRAD I do have 4 AI's. There are many more options for barrels with the AI then the MRAD. There are just more guys making very good barrels for AI's. When I first was going to a Multi cal rifle I looked at the DTA. MRAD and AI. I ended up getting the original AI-PSR and have shoot the hell out of it. I am on my 3rd 338LM barrel 2nd 300wm barrel and when its done I may try the 300prc. I don't shoot short action in the PSR as I have other short action AI's. When I did shoot short action from the PSR I had 0 feed issue work flawless.
     
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    Hobbitsniper22

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    I can’t help you with the MRAD vs AXMC vs AXSR debate but I do shoot both the .300 Norma and the 300 PRC. For me, both rounds are pretty much equal out to 2000 yards so it comes down to this; if you reload go Norma if you’re going to shoot factory, go PRC. I shoot both using 225 ELD-Ms and velocities are within 20 fps of each other so ballistically it’s a tossup; Hornady factory PRC Ammo is relatively inexpensive and shoots very well.
    How do you find the recoil between 300 prc and 300 norma is there a considerable difference? As i imagine recoil management helps alot with accuracy
     

    Sig Marine

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    How do you find the recoil between 300 prc and 300 norma is there a considerable difference? As i imagine recoil management helps alot with accuracy
    My experience with H1000 powder in each rifle is that the recoil is a push rather than a snap and very tolerable. and you are correct; recoil management is important with accuracy and extremely so with bigger magnum calibers.
     
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    JB.IC

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    Curious to continue this conversation, the 300PRC and 300NM apples to apples MV, bullet, etc., would the 300NM have less chamber pressure?