Is IMR 4350 ok to use with a 70gn sierra blitzking? I bought it for 85gn but want to go to 70gn.

My 243 does really well with 70gr SBKs and 46.5gr of IMR-4350 with an OAL of 2.72". It's a warm load so work up.

One of my .243's most accurate loads is the 75 sierra in front of a max load of imr 4350. I wouldn't think there would be much difference between the 75 and a 70. Good velocity also.

Sierra No. 5 says for 70 and 75 gr bullets with IMR4350:

Min 41.6 gr 3000 fps
Max 44.6 gr 3300 fps

For 70 gr Blitzking a COAL of 2.67"

For the others a COAL of 2.625"

LWD

IMR-4350 is one of the better powders for this round with any bullet weight.

quote:

Originally posted by vines:
IMR-4350 is one of the better powders for this round with any bullet weight.

I disagree: It works fine with 80 or 85 grain bullets and under, but higher velocities and a more favoarable (ie. near 100%) loading densities can be obtained with slower powders using 90 to 105 grain bullets. Still, 4350 is not a bad powder with the heavier bullets, it just lags 50 or 75 fps behind some others.

In the two 243's I've loaded for, H-4350 has worked well with 85 gr and heavier bullets. With 75's I've found Varget gave better accuracy.

i shoot 105 a-max in my savage .243 with imr 4350 with great success and b4 this bullet i shot sierra 100gr SBT so yea it should still b good for ur smaller bullets i bet!

FYI
70gr.hp,bulk, 46.8 gr. XMR 4350 compressed, 3676 fps. mild, a little sooty, 3 shot 3/8" @ 50 yds.

59gr. V Max, same load, 3793 fps. some soot, mild, 4 shot 3/8" group ar 50 yds. roger

With the lighter bullets I'm having great success with Varget.

Good luck.

Point of information: The moderator referred to H4350. To my knowledge, load recipes for Hodgden 4350 are not interchangeable with IMR 4350.

quote:

243's I've loaded for, H-4350 has worked well with 85 gr and heavier bullets. With 75's I've found Varget gave better accuracy.

Ditto.

40.5 gr of IMR 4350+107gr. SMK= 3/4 min in precision rifle