sevenbridgesroad
Beginner
- Feb 2, 2021
- 11
- 3
Yesterday I was running some pressure and velocity tests in my rifle using imr 4320 and 4350 using 210 partitions in my 338-06.
I was using Nosler's published load data to see what they produce in my rifle. My rifle has a 24 in barrel, but I was using CCI 200 primers. All cartridges were loaded with the same OAL of 3.33.
I loaded the cartridges with 4320 at 51, 51.5 and 52 grains. 52 grains is listed as the max load, which produced 2589 on my chrono. This is 100 fps less than listed by Nosler. 4320 is listed as most accurate.
The cartridges with 4350 were loaded at 58, 59, 59.5 and 60 grains. 60 grains listed as max load. At 60 grains the chrono showed 2643, 32 fps higher than listed by Nosler.
The 4350 performed as expected, but 4320 came up short by quite a bit. Could this be a normal variation in my rifle? Could I push the 4320 up in .5 grain increments until I see signs of over pressure?
4350 has always produced great results in my 30.06 and my fathers 7mm mag, but from posts I've read, it seems as though 4350 is viewed as too slow in a 338-06.
I appreciate any thoughts.
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I was using Nosler's published load data to see what they produce in my rifle. My rifle has a 24 in barrel, but I was using CCI 200 primers. All cartridges were loaded with the same OAL of 3.33.
I loaded the cartridges with 4320 at 51, 51.5 and 52 grains. 52 grains is listed as the max load, which produced 2589 on my chrono. This is 100 fps less than listed by Nosler. 4320 is listed as most accurate.
The cartridges with 4350 were loaded at 58, 59, 59.5 and 60 grains. 60 grains listed as max load. At 60 grains the chrono showed 2643, 32 fps higher than listed by Nosler.
The 4350 performed as expected, but 4320 came up short by quite a bit. Could this be a normal variation in my rifle? Could I push the 4320 up in .5 grain increments until I see signs of over pressure?
4350 has always produced great results in my 30.06 and my fathers 7mm mag, but from posts I've read, it seems as though 4350 is viewed as too slow in a 338-06.
I appreciate any thoughts.
Sent from my SM-T500 using Tapatalk