Hi Fellow 450 BM shooter! Frst post as I recently acquired a 450 BM pistol ( AR, 10.5 ").
I Really enjoy shooting the shorty Thumper but have a short barreled/pistol question.
Load Data:
Lee Dies, Lil Gun powder and 250 XTP ( yeah I know, not rated for High Velocity) and 300 XTPMags in Starline cases with CCI 41 primers.
I seem to have unburned powder in the bore/chamber with the 250s, they run around 1650 with 31 grn of Lil Gun crimped at 2.085". Cases are somewhat sooty at this charge, but less so than at the starting load of 28 grn. Is this common with short bbl'd 450s? I don't want to run the charge up as these bullets are again, not the right ones, once these are gone, I will use only HV rated bullets. With similar but rated bullets, would increasing the charge and thus pressure/heat help burn more of the powder? ( I know I will eject some unburned powder simply due to the short bbl).
300s seem to really shine- same charge and COAL, they run at 1780 fps ( n=3, so not definitive) and the cases are much cleaner.
I had some CCI 400 SR primers left over, so I loaded a few rounds with them. Definite delay in ignition with these guys. Is that common? Didn't think LilGun would be hard to light.
Accuracy at 50 yds is okay, just okay ( Bear Creek barrel, but I have good success with other Bear Creek products to date), using a 3 MOA red dot. It will kill a deer.