jimbobborg
Oddball caliber fan
Last week I took a few firearms out to crono some competition loads. The AR I built with a complete CMMG lower and a 16" complete upper was used. I have the heavy 9mm buffer, standard carbine spring, and a 9mm Colt style BCG. The barrel is a 16" SPR profile barrel, with an A2 style bird cage flash suppressor. I got a cheap holosight ($80) and tried it out after I swapped out the 5.56 receiver for a 9mm receiver. $1.50 in quarters keeps the spring forward and prevents the bolt from going back too far and breaking the bolt catch.
I loaded up two 32-round Colt style mags, one with 147gr lead bullets in front of 2.4gr of Titegroup. I was averaging 880 fps with this combo, so it makes Minor for USPSA PCC. With a 147gr coated bullet in front of 3.2gr of Titegroup, I was averaging 990 fps. It's pushing Major. The nice thing about the lighter load is, I use less powder, and recoil is like shooting a Ruger 10/22, with less noise. I get no dot bounce in the holograph sight. Once I take out the milspec trigger and get something better, I should be running with the big dogs then. Not bad for a rifle I'll have less than $1000 in after the new trigger and with the current optic.
I loaded up two 32-round Colt style mags, one with 147gr lead bullets in front of 2.4gr of Titegroup. I was averaging 880 fps with this combo, so it makes Minor for USPSA PCC. With a 147gr coated bullet in front of 3.2gr of Titegroup, I was averaging 990 fps. It's pushing Major. The nice thing about the lighter load is, I use less powder, and recoil is like shooting a Ruger 10/22, with less noise. I get no dot bounce in the holograph sight. Once I take out the milspec trigger and get something better, I should be running with the big dogs then. Not bad for a rifle I'll have less than $1000 in after the new trigger and with the current optic.