[sapper740]

Originally posted by Alex Blair
Rob...


I tried the same thing with my old BSA .30-'06 packing the case full of 4895 and cramming the Speer boattail down tight...
Anyway I couldn't get the same blast effect but did get the effect of wandering rounds...

" Alex, a not uncommon occurence when reloading with extruded grain type powders. If the load is compressed when seating the bullet many of the granules break exposing the nitrocellulose. With no deterent coating at the break, you get varying burning rates and therefore varying pressures. Remember, modern powders are progressive which means as pressure increases so does the burning rate."



The velocity was so high that there was no spin on the round coming out of the barrel and at 500 meters aim point would dig furrows in the range anywhere from 100-400 meters out and 10-30 feet off center aim point..



"Alex, there's no way your bullets left the barrel without spin, unless you were firing them in a smoothbore. Even with the worst copper and powder fouling, you will still have substantial spin on the bullet. Did you chrono your loads? A possibility, however slim, is that you received a bad bunch of bullets and they were shedding their jackets after leaving the muzzle, but even a really hot load in an '06 with and 168 gr. bullets would be hard pressed to exceed 3200 fps. You say you were attempting to mimic the muzzle blast of the other shooter's 7mm Rem. Mag. Any chance you were flinching? It's not uncommon. I flinch when I shoot really hot loads, and I load beyond what the manuals say by moving up in 1/2 gr. increments and watch for pressure signs. It's not the recoil, it's the muzzle blast."



Normally with 48.5 grains 4895 at 300 meters and a 168 grain Speer boattail I could cover three rounds with my thumbnail..so I don't think it was me..
Anyway I do miss the fun ...
Thanks for mentioning it...