Comments on: Can’t Find Varget or Reloder 15? Then Try IMR 4320

By: Jerry

Jerry — Tue, 01 Sep 2015 01:37:33 +0000

I’ve become a fan of 4064 all over again, I forgot how good that powder was. The kernels are a bit big but for 308 its my go to powder in all my AR rifles. I might have to try this 4320 with the 77 MK.

By: Guy

Guy — Mon, 31 Aug 2015 23:19:35 +0000

The online IMR data for 4320 with the 155 grain bullet in .308 lists a max charge you could never fit in the case. Thats the beauty of 2000-MR, its ball so 48-51G is right at 100% case capacity. . So you can get the velocity benefit of a slower powder.

By: Guy

Guy — Mon, 31 Aug 2015 14:58:16 +0000

I also feel this temperature sensitivity thing is over rated. In reality I shoot a years worth of match with temperatures between 65 and 85 degree`s. Just a 20 degree spread. Not a big deal for any powder.

By: Guy

Guy — Mon, 31 Aug 2015 13:35:06 +0000

Have not tried 4320. I switched off to Alliant 2000-MR. Slower then varget, right between RL15 and RL17. Available and about 180.00 a 8lb jug with haz-mat and shipping when you buy 2. Have had excellent results in .223 and .308. Its a joy as well to throw even the LR charges. Being a ball powder you can the right amount in the case easily. Clean and temp doesn’t seem to bother it.

By: Barry

Barry — Thu, 04 Sep 2014 21:08:49 +0000

4320 did not impress me in .223 behind 52gr bullets.

By: Guy

Guy — Wed, 03 Sep 2014 22:37:26 +0000

I believe IMR 4320 is really to slow for the 155 palma .308 but would be a good choice with the heavier bullets.

By: Kris

Kris — Mon, 28 Oct 2013 17:30:26 +0000

How small are the kernels? Like Benchmark or H322?

By: Kym

Kym — Sat, 26 Oct 2013 22:28:16 +0000

I started using IMR 4320 in my 22-250 AI in 1980, right up until they stopped exporting these powers into australia. i always wondered what speeds those little 55 grain pills were doing but in those days i didn’t have a chronograph.
4320 was my go to powder for all my 22-250 AI loadings. I shot out 3 barrels with this powder and thousands of ferral cats crows goats foxes. An excellent power.