Comments on: Powder Comparison Test: H4350 vs. IMR 4451

By: spclark

spclark — Wed, 13 Jul 2016 15:17:07 +0000

I was hoping IMR4451 would work as a viable H4350 substitute after running out of the three pounds of 4350 I found worked best in my 2016 cartridge project, a 284INCH for 1,000 yards.

Range testing loads at 600 yards gave me good results but last weekend I had some unexpected fliers at 1,000 with 4451 that make me take a step back before using it again.

I did manage to score 16#’s H4350 though but not in time for last weekend.

Atmittedly there may be other issues (neck tension’s my focus at present; this cartridge has a neck like Stan Ware’s 30 Wolfpup!) that caused the fliers so to be fair it may not be the 4451 after all. Same charge weights of each gave virtually identical velocities & spreads over my 35P.

By: Map

Map — Mon, 11 Jul 2016 14:08:30 +0000

Test #2 56 degrees should be h4350.

By: Chris

Chris — Mon, 11 Jul 2016 10:59:24 +0000

His velocity changes are more than mine from cold to warmer temps. I was seeing velocity changes of less than 30FPS in 30 to 80 degree weather with 4451. About the same with H 4350 too.

By: Lee

Lee — Sun, 10 Jul 2016 17:53:21 +0000

Did he switch row 2 around to see if we were paying attention?

By: Guy

Guy — Sun, 10 Jul 2016 16:48:13 +0000

Same company, they should be able to duplicate it. Interesting test.