walsh Posted July 16, 2010 Share Posted July 16, 2010 I've been working on loads with six powders I have here and while H322 seems to be the favorite so far, H355 isn't bad either. Sunday I was shooting at a 100 yd target and went through 20 rds with the following: BM Gas Piston 16" Geisselle 4 1/2 match trigger H335 22.5 gr 55gr Hornady HPBT w/ cannelure Federal SRP no crimp 2.220 OAL (+/- .002 as the Redding match dies are great) All hand loaded ammo in LC once fired brass. 90 degrees little wind if any Altitude 450 feet +/- 50 feet Looking at the Hornady #7 reloading book the closest read is 22.4 with a COL of 2.20 at 3,000 fps. max stated is 23.2 gr at 3100 fps A father had his son shooting an rifle air gun at 25 yds a few benches down and he came over and was spotting me. All the rounds were inside 1.5" at 100 yds. He asked me to shoot at the 300 yd metal gong that's 20" and hangs from a sturdy steel tripod and makes a cool sound but when I went to look for it I found it was down for repair. But we have 10" ones on stakes that I shot at. I'm using a Nikon 10x BDC reticle and thought I'd be hitting it most times. But it wasn't just that 17/20 missed, more than half missed by a foot as could be seen by the dust in the berm. So I loaded up 10 more and had the same problem with only 1 hitting and a few about 1 foot off. All the misses were not consistently in one spot. If it were windy I'd say maybe that was it. If I has used 20.8 gr (2800 ft) I'd say that perhaps that was the cause. So I'm stumped. I've really been working on my benchrest shooting and a solid platform and that 2nd stage of the trigger is 1/2 pound. For argument's sake let's give me the benefit of the doubt and say it wasn't me. Is it that shooting at 300 yds for consistency requires something like a 69 gr SMK bullet as the 55 gr becomes unstable at 300 yds? Do I need to load at max data velocity for 300 yds? Thanks in advance, Walsh Link to comment Share on other sites More sharing options...
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