castnblast
New member
I just chrono'd some loads, and discovered a problem - I did it because of strange shot patterns. May be the powder charge - please note I hand trickle each round to the exact weight.
Here's the issue. I've had excellent luck with this powder on 50gr. speer's. They scream - 3918 give or take a few either side. I noticed my shots were scattering on my 55 gr. Sierra BTSP's. Scope was fine, grooves fine, trigger good, mounts tight. So I borrowed a chrono, and here's what happened - first shot - 3606 fps. 2nd 3561. 3rd, 3548. As the barrel got hotter, velocity dropped like a rock. Don't have this problem w/ the 50's. Has anyone else had issues? Also, I had similar issue with IMR 4064. I'm looking for another powder - the gun is very capable of shooting tight groups - I need a powder for my 55grs. I will continue to use this for 50's but it's obviously not doing well with my 55 gr, which is a bummer, because it meters great. I'll buy some 50gr and continue to use, but what would be yoursuggestions for my 55 gr. dilema?
Here's the issue. I've had excellent luck with this powder on 50gr. speer's. They scream - 3918 give or take a few either side. I noticed my shots were scattering on my 55 gr. Sierra BTSP's. Scope was fine, grooves fine, trigger good, mounts tight. So I borrowed a chrono, and here's what happened - first shot - 3606 fps. 2nd 3561. 3rd, 3548. As the barrel got hotter, velocity dropped like a rock. Don't have this problem w/ the 50's. Has anyone else had issues? Also, I had similar issue with IMR 4064. I'm looking for another powder - the gun is very capable of shooting tight groups - I need a powder for my 55grs. I will continue to use this for 50's but it's obviously not doing well with my 55 gr, which is a bummer, because it meters great. I'll buy some 50gr and continue to use, but what would be yoursuggestions for my 55 gr. dilema?