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M1a with 168gr. bthp

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  • M1a with 168gr. bthp

    I want to use IMR 4895. I have loaded many 150gr.loads using 43.5gr. IMR 4895 but want to try the 168's. Anyone use them? what do you load?

  • #2
    For IMR 4895 and 168 gr Hodgdon lists 41gr starting and 45.4 max compressed at 2.800"
    I do not know how far you shoot this gun but if you shoot it 200 yards I would work loads from 41gr to probably 44.5 gr in .5gr steps and shoot a ladder at 200 yards. then go from there.
    I read about a few people that settled in at 41.5gr for a sweet spot.

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    • #3
      Without knowing case capacity and bullet brand, it'd be hard to give exact number, but I'd drop 2grs and work back up in .1gr steps to find sweet spot, which will most likely fall between 41.8gr and 42.2gr, depending on who's 168gr you're using.
      Quote from the Rev. Martin Niemöller, a Holocaust survivor:

      First, they came for the Socialists, and I did not speak out -- because I was not a Socialist.

      Then they came for the Trade Unionists, and I did not speak out -- because I was not a Trade Unionist.

      Then they came for the Jews, and I did not speak out -- because I was not a Jew.

      Then they came for me -- and there was no one left to speak for me.

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      • #4
        I have a box of Hornady to start with.

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        • #5
          Unfortunately as i get older and my eyes get worse, the gun is capable of more accuracy than I am. I am thinking of mounting a scope on it. Any experience with scope mounts for the M1A?

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          • #6
            40.5 -41.5 of IMR 4895 would be an excellent choice.
            I play Choctaw bingo every Friday night.

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            • #7
              Thanks. I think I will start at 40gr. and work up in .5 increments

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              • #8
                I'm shooting 40.0gr of IMR4895 suppressed with 168gr SMK. Shot exactly one clover leaf once. Have yet to do it again, mostly about 2 MoA @ 100 yards. I'm about ready to give up on this rifle suppressed as it gets way to dirty, way too fast. Thinking I'm going to go back to just flash hider and loud booms.

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                • #9
                  Originally posted by freonjohn View Post
                  Unfortunately as i get older and my eyes get worse, the gun is capable of more accuracy than I am. I am thinking of mounting a scope on it. Any experience with scope mounts for the M1A?
                  I purchased the Springfield Armory Aluminum mount vs. the Sadlak steel mount. Figured since my M1A's were Springfield what would it hurt. Truth is, it's a great mount and is sturdy as can be. Instructions are easy to follow for mounting, I'd only suggest being careful driving in the drift pin as I had some issues with mine that put a hole in my finger. Once the mount is on, it's not going anywhere. You can still use the open sights as well. The caveat being that you'll need a cheek riser to see through your optic of choice. I went with an adjustable Kydex riser and it works great.


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                  • #10
                    Originally posted by SavageShooter View Post
                    I'm shooting 40.0gr of IMR4895 suppressed with 168gr SMK. Shot exactly one clover leaf once. Have yet to do it again, mostly about 2 MoA @ 100 yards. I'm about ready to give up on this rifle suppressed as it gets way to dirty, way too fast. Thinking I'm going to go back to just flash hider and loud booms.
                    Have you tried faster powder, like benchmark? 37gr should be similar pressure to 40gr of imr4895. I know benchmark burns much cleaner, than 4895, for me anyway. With the can, you shouldn't have issue, with enough port pressure to cycle.
                    Quote from the Rev. Martin Niemöller, a Holocaust survivor:

                    First, they came for the Socialists, and I did not speak out -- because I was not a Socialist.

                    Then they came for the Trade Unionists, and I did not speak out -- because I was not a Trade Unionist.

                    Then they came for the Jews, and I did not speak out -- because I was not a Jew.

                    Then they came for me -- and there was no one left to speak for me.

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                    • #11
                      I have a pound or two of Benchmark I can try Robert. Thanks for the tip!

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                      • #12
                        I'll check out the springfield mount. Thanks

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                        • #13
                          I just stumbled across this, a LOT of good pressure test data of the M1 Garand gas system with MUCH commercial ammo,a dn information on the standard 50gr IMR4895 GI .30M1 loading.

                          http://www.garandgear.com/m1-garand-ammunition

                          Enjoy Garand-ers.

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