by deadeer » Tue Oct 19, 2021 7:23 pm
Finally got to testing the 250 monoflex. My barrel is a 20" MGM Encore. Like has been common on my other MGM's, it must be very tight because I dont need near as high of charge to get velocities of other guns.
Being little load data available, I started at 30gr Lil Gun. I seated the bullets out to 2.435" which is .015 off the lands in my gun. I got vertical stringing of 4-5", and was swearing I was getting a slight hangfire. I went up to 35gr. Accuracy got a little better, but pressure signs on the Winchester small rifle primer was getting bad after 33gr and recoil was getting brutal. I with the long oal, there was still room for more powder, but that wasnt working. So I tried closing up the space by seating the bullet deeper to 2.250". First 3 shots in same hole, no delay, and recoil manageable. The load has repeated several times, so I am gonna call it done for this season.
For comparison, I shot a friends Ruger Ranch up to 37gr Lil Gun with no pressure signs and one hole accuracy.