Gunzmatter

I have a SIG MPX SBR'd. Fun as hell, and fast. I put the Geissele SSA-E trigger, along with the Romeo 4 on it. I managed to get a hold of a factory X5 compensator to toss on it also. So far with the extended base pads on the mags, no feeding issues. It runs any ammo I feed it. The only thing I can say is that it needs to be cleaned and lubed a lot. Very dirty, but I guess that's a small price to pay for it running flawlessly. I have noticed about every couple thousand rounds that tossing the gas valve in an ultrasonic cleaner really helps.

I have actually used power pistol with the BlueBullets in 147 gr. (Weight of the bullet is actually 151gr.) I tested the loads using my STI DVC Steel. The more power the better on this gun. It does run minor and major, so it is good for steel challenge, and USPSA open division. I will post data since there is few using these components......use at your own risk! Loads are as follows: 151gr Blue LRN 5.9 gr power pistol cci 500 C.O.L. 1.160 mixed brass I tested with an 8 shot group. AVG VELOCITY 1117 F.P.S. 1100 P.F.= 168 1115 1106 1095 1141 1117 1135 1131 Next group same specs except 6.0 gr. power pistol. 1123 AVG VELOCITY 1136 F.P.S. 1128 P.F.=171 1123 1173 1134 1146 1128 1135 Last group I made 9.. 6.1 gr. power pistol 1204 AVG VELOCITY 1164 F.P.S. 1165 P.F.=175 1147 1178 1140 1175 1180 1124 1170 The last load at 6.1 gr. felt the smoothest. No primer flattening, case bulging or other pressure signs. Good luck.