Velocities for H4895 and H4350 in .308 - 01/19/17
My son's T-3 in .308 is fantastically accurate, nice to shoot and to look at. We found an accurate load of 42.5 grains of H4895 under a Hornady 150 FMJ that shoots .75" groups all day long. The books say velocities should be over 2700 fps from a 24" barrel (which his T-3 has). So when I put it over my chronograph I was more than a little surprised to see high 2400's. I've been much less velocity conscious as of late, but isn't this REALLY low?
I've got a keg of H4350 and found an old resource that listed .308 loads. For the heck of it, I did some load development and found 50.3 grains produced better accuracy than the H4895 and it was going 2750-2800 fps. So I know it isn't the gun. What's up with H4895? All resources say H4350 is too slow for the .308 but it flat smoked the H4895 in all respects.
I threw both loads through my 16" Oracle 7.62 and got similar results. The 4985 averaged 2250 fps and the 4350 was going a solid 2500 fps.
Also, I'm well aware that 42.5 gr of 4895 is a light load and 50.3 of 4350 is heavy, I'm going by listed expected velocities.
Has anyone else had similar results?
I've got a keg of H4350 and found an old resource that listed .308 loads. For the heck of it, I did some load development and found 50.3 grains produced better accuracy than the H4895 and it was going 2750-2800 fps. So I know it isn't the gun. What's up with H4895? All resources say H4350 is too slow for the .308 but it flat smoked the H4895 in all respects.
I threw both loads through my 16" Oracle 7.62 and got similar results. The 4985 averaged 2250 fps and the 4350 was going a solid 2500 fps.
Also, I'm well aware that 42.5 gr of 4895 is a light load and 50.3 of 4350 is heavy, I'm going by listed expected velocities.
Has anyone else had similar results?