It was a nice day today and we took out several guns to Chrono. Within acceptable pressures today in my 29 inch barrel 270 AI with 61.4 grains of imr 4350 cci #250 mag primers loaded @ .003 from the lands of my .300 throated barrel. I had a max of 3598 and a low of 3589 fps on a 10 shot read out.
I should also say my standard .270 with a 26 inch barrel with 52 grains of 4320 and mag 250 primers had flat primers also, with @3410 av. behind 100 gr. moly coated
I also had loaded up some 150 spbt with 62.4 grains of 7828 cci 250 and had @3320 fps out of the AI. It has actually gone faster with H1000 with 64.2 grains. But you only have a case life of reloading 3-4 times and the primer pockets get loose and some cracked necks. The most accurate loads are down in the 3260 - 3280 range with 60.9 7828 or 60.4 of r-22
[ 11-27-2004: Message edited by: budlight ]
I should also say my standard .270 with a 26 inch barrel with 52 grains of 4320 and mag 250 primers had flat primers also, with @3410 av. behind 100 gr. moly coated
I also had loaded up some 150 spbt with 62.4 grains of 7828 cci 250 and had @3320 fps out of the AI. It has actually gone faster with H1000 with 64.2 grains. But you only have a case life of reloading 3-4 times and the primer pockets get loose and some cracked necks. The most accurate loads are down in the 3260 - 3280 range with 60.9 7828 or 60.4 of r-22
[ 11-27-2004: Message edited by: budlight ]
