Ar9 bolt weight removal

[1911luvr]

Meh, i dont give up easy[emoji16]. I kinda like experimenting. I got the gun to work with the heavy buffer head, but not with the wave spring under it. Im still not happy with the recoil now. It was awesome with the weight in the bolt, the delrin buffer head, and the 3 wave springs. Before i go back to that set up, i may go back to this buffer i made for a rifle length spring and tube.

If you don’t have a rifle length tube I would not run that buffer as it could go solid once the spring compresses.


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[Shootymacshootface]

1 hour ago, 1911luvr said:

If you don’t have a rifle length tube I would not run that buffer as it could go solid once the spring compresses.


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It is, its actually the same dimensions as a .223 buffer for an A2 stock. There is plenty of room for the rifle length spring to fully compress. 

Thanks. 

[Shootymacshootface]

Finally, I've got this dog running again. I went back the the first buffer i made, but with a modification. Im using a .223 rifle spring, a delrin spacer, no bolt weight, and no wave springs. 

It is soft, smooth, and reliable (so far). I put a new load together for it, 3gr clays with a 115 plated.

Thanks for all the help guys!

John

 

[Acer2428]

 I bet that is SOFT.

 

Does 3.0 clays make PF out of a 16" barrel? I love that load, but I have to push the max load to make PF out of a 5.5" barrel, not worth the risk for me.

[Shootymacshootface]

It is soft. Im not sure that I even need hearing protection to shoot this one. Next time out i will shoot some thru my chrono.

[Shootymacshootface]

Shot a few loads thru the chrono today. All were a 9mm 115gr plated round nose berrys, 1.160 oal.

3.0gr of clays, 1068.7 fps for 122.9pf

3.5gr of clays, 1193.8fps for 137.29 pf

4.0gr of tightgroup, 1306.9fps for 150.29pf

3.0gr of clays was super light w/ almost no recoil.

4.0gr of tightgroup was snappy but very little dot movement and very accurate. 

[SJMPCC022]

23 hours ago, Shootymacshootface said:

Shot a few loads thru the chrono today. All were a 9mm 115gr plated round nose berrys, 1.160 oal.

3.0gr of clays, 1068.7 fps for 122.9pf

3.5gr of clays, 1193.8fps for 137.29 pf

4.0gr of tightgroup, 1306.9fps for 150.29pf

3.0gr of clays was super light w/ almost no recoil.

4.0gr of tightgroup was snappy but very little dot movement and very accurate. 

 When we used to load 4.5-5.0gr for 200gr .45acp in the days when you shot a single stack in Limited division, the move was very slow and steady. When I checked that load I was just at 125pf, but it was close. As a rule( mine) flaky shotgun powders aren't the first choice in very small quantities. You are also .040 longer than my OAL, makes sense it is a bit slower. I am also using a plated bullet, Xtreme.

 

Titegroup always has been snappy, but it is consistent and meters pretty well. Also accurate as you stated.

 

If you have any Power Pistol, give 4.2/4.3gr a try, same bullet.

Edited October 3, 2018 by SJMPCC022
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