Hi,
first of all I apologize if my explanation seems unclear (English is not native to me).
I have been reloading for well over 10 years, but recently I come up to problem that makes no sense to me.
My friend reloaded an ammo for his M&P 9, he used one time shot brass, 115 grs. Raineer Ballistic bullets, CCI primers and Clays Hodgon powder.
On Hodgon page they say to use the "lead" data (due to the softness of the bullet). So, for 115 bullet weight it should be
115 GR. LRN Hodgdon Clays .356" 1.100" 3.0 954 25,300 CUP 3.4 1039 31,000 CUP
Well, after weeks, he went all the way from 3,7 to 4,4 and the spread at 25 meters was nowhere near the factory ammo (out of 5 shots, benchrest) still at least two flyers 30cm off (at least). With the powder load going up, still not much of an improvement.
Unfortunately, last 10 years I only reload .40S&W and only with Accurate powders (in Europe, some powders are not as well known as here).
My suggestions were- too much crimping, bullets with not right diameter, ... but still- since we shot it all benchrested, and there was no remarkable improvement (if you miss a paper target at 25 meters, while shooting benchrest- something is wrong).
Can anybody help out with some constructive advice?
PS: factory ammo shoots a reasonable spread.
Thanks a lot.
F