Well, first time on the range w/ this rifle. 30-378 WeatherBy Accumark w/ a Vortex PST 4x16-50 FFP scope.
Since load data is scarse and limited, I started w/ 93 grns of IMR7828 SSC and loaded up to 96 grains by .5 grain increments using Norma brass, 210 Federal primers and 208 BTHP Hornady bullets.
I noticed the powder speeds did not show what I expected at 28 degrees. Then when I did get to the max 96 grain load I had loaded up too, the round was pushing 3150 fps and I couldn't open the bolt w/o a lot of effort.
Previous rounds all the way up to 95.5 grains of powder did not result in the pressure issues seen on the Norma brass. I was chroming the 95.5 grain loads at 3077 and 3026. The 96 grain loads were chrono'ed at 3143, 3160.
Another thing I noticed, I had 3 rounds that were delayed ignition of the primer. The hammer would fall and about a 1/3 of a second the round would go off.
I was quite happy w/ putting 14 rounds in a 4" diameter at ranges of 100 and 300 yards for a first time bore sited rifle.
But, could the problems I'm seeing w/ the load ballistic speeds be attributed to the Federal 210 primers? The chrono distance is 10'.
I'm going to get a box of Federal 215 primers and try them. Another thing, this rifle kicks about as much as my .270 Weatherby mag.
Any input is welcome.
Regards,
David
Since load data is scarse and limited, I started w/ 93 grns of IMR7828 SSC and loaded up to 96 grains by .5 grain increments using Norma brass, 210 Federal primers and 208 BTHP Hornady bullets.
I noticed the powder speeds did not show what I expected at 28 degrees. Then when I did get to the max 96 grain load I had loaded up too, the round was pushing 3150 fps and I couldn't open the bolt w/o a lot of effort.
Previous rounds all the way up to 95.5 grains of powder did not result in the pressure issues seen on the Norma brass. I was chroming the 95.5 grain loads at 3077 and 3026. The 96 grain loads were chrono'ed at 3143, 3160.
Another thing I noticed, I had 3 rounds that were delayed ignition of the primer. The hammer would fall and about a 1/3 of a second the round would go off.
I was quite happy w/ putting 14 rounds in a 4" diameter at ranges of 100 and 300 yards for a first time bore sited rifle.
But, could the problems I'm seeing w/ the load ballistic speeds be attributed to the Federal 210 primers? The chrono distance is 10'.
I'm going to get a box of Federal 215 primers and try them. Another thing, this rifle kicks about as much as my .270 Weatherby mag.
Any input is welcome.
Regards,
David
