BIGTRUCKNUT Posted January 27, 2021 Report Share Posted January 27, 2021 (edited) Going out this weekend to do a second test fire. First test fire last Fall went okay. Firing long 300 grain Parker Match bullets propelled by Lil Gun, the rifle loaded from an unmodified magazine, cycled, ejected spent brass, and locked the bolt back on the last round as it should. At the time I didn't make up a lot of ammo for the test so I didn't get a chance to adjust the gas block to my liking. In the few shots I made, it had a noticeable kick when compared to my LR 308. At the time of the first test the LR 45 had a 16" barrel, mid-length gas tube, and DPMS 308 carbine buffer and spring. I have since replaced the buffer tube with a BCM A5 carbine length tube (7 3/4") and machined my own "heavy buffer" to replace the stock DPMS carbine buffer. The new buffer is made from stainless to an overall length of 3.25", accepts three tungsten weights, and weights 9.2 oz. Is there anything I should be concerned about when testing it with the new, significantly heavier buffer? Edited January 27, 2021 by BIGTRUCKNUT Quote Link to comment Share on other sites More sharing options...
BIGTRUCKNUT Posted January 27, 2021 Author Report Share Posted January 27, 2021 Hoping to borrow my club's chrono Saturday morning to get some accurate velocity data on the 300grain/Lil Gun loads. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted January 28, 2021 Report Share Posted January 28, 2021 10 hours ago, BIGTRUCKNUT said: The new buffer is made from stainless to an overall length of 3.25", accepts three tungsten weights, and weights 9.2 oz. Is there anything I should be concerned about when testing it with the new, significantly heavier buffer? FINE lookin' buffer, man!!! Damn good work! I wouldn't worry about a single thing, testing that buffer, at that weight. Not at all. Hell, blow-back pistol-cal specific buffers are commonly in the 7 or 8 ounce range. I have one .308 Win setup that's running a 5.4oz buffer with another 3.95oz inserted into the carrier body. Run it, and let us know how it goes... Quote Link to comment Share on other sites More sharing options...
BIGTRUCKNUT Posted January 28, 2021 Author Report Share Posted January 28, 2021 Thanks... it's nice having a lathe here at the house. Glad there's no concerns, I'll run it and report back. Quote Link to comment Share on other sites More sharing options...
BIGTRUCKNUT Posted February 1, 2021 Author Report Share Posted February 1, 2021 Didn't get a chance to shoot this past weekend. I have range day planned with a few friends this coming Friday, hope to get the test firing done then. Ty Quote Link to comment Share on other sites More sharing options...
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