Imr4350

[Deadeyejedi]

I've been using imr 4350 to load my 3006 .270 and 243 just looking for a new powder that works universally in theses calibers generally load 165 grain in the 06 130 in the 270 and 95 gr in the 243.some formulas would be helpful thanks

 

[LoonWulf]

H4350, imr4831...uuhhhhhh pretty much any med/slow, slow powder should fit the bill.

 

[Nature Boy]

RL17, RL19

 

[ArchAngelCD]

Why do you want to change powders? I use H4350 and it works well. Knowing why might help in choosing a powder.

 

[Bart B.]

IMR4064 produced much better accuracy with bullets 160 to 180 grains in the .30-06. IMR4350 shoots bullets faster, but they don't land as close together on target than IMR4064 produces. Heavier bullets do well with IMR4350. What's more important; bullets shooting 100 fps faster or landing a lot closer together?

 

[Gtscotty]

I've used H4350 in all of those cartridge/bullet weight combinations and thought that it worked great. I tried slower powders in the .270, but velocities weren't much higher and the accuracy didn't match 4350.

 

[e rex]

Probably IMR 4064

 

[rocirish]

We have been using IMR 4064 in 243 and 30-06 since it was Dupont. Have been real happy with it.

 

[horsey300]

My .243 with 95+ run 4831SC and h1000, loves the h1000 with 100 gr Sierras, 95 bt and partition, but the SC is a good standby.

 

[sage5907]

I used to be an IMR 4350 user but I have since changed to Reloader 17 for both the 30-06 and 270 Winchester. Reloader 17 is for the reloader who may be willing to give up a little accuracy for extra velocity. However, in the 30-06 with 57 grains of R 17 and 150 grain Sierra gameking bullets it does as well or better than 4350 and shoots less than MOA. I have also been using 56 grains of R 17 with a 165 grain bullet. In the 270 Winchester 52 grains of R 17 with a Berger 130 classic hybrid shoots less than MOA and it is very accurate. I also use this load with Sierra gameking bullets. I don't load for a 243 but the book shows 40 grains of R 17 with a 100 grain bullet to have a velocity of about 3000 fps. I really like Reloader 17 and I don't plan to go back to IMR 4350.

 

[jmr40]

IMR4064 produced much better accuracy with bullets 160 to 180 grains in the .30-06. IMR4350 shoots bullets faster, but they don't land as close together on target than IMR4064 produces. Heavier bullets do well with IMR4350. What's more important; bullets shooting 100 fps faster or landing a lot closer together?

That hasn't been my experience in my rifles. Even if it were a bit more accurate the difference between a .3 MOA rifle and a .5 MOA rifle isn't usable in a hunting rifle shot in field conditions. I'd not give up 100 fps to shave .2MOA off a rifle that would only be usable from a shooting bench. Plus H4350 is far more stable in extreme temperature changes.

Between IMR4350 and H4350 I've been able to get almost identical speeds and accuracy with 150-180 gr bullets. Either is I think ideal, but I do give the edge to H4350 simply because of the temperature stability. If you start shooting bullets lighter than 150 gr or heavier than 180 gr there are better options.

 

[repeat]

I've been using 56.0 gr's IMR 4350 for Hornady's 165 gr Interlock and have no reason to change.
I use that powder for 270,30/06,300 Win Mag and 300 Weatherby Mag.
I have used Reloader 17 with good results but since IMR 4350 has been back on the market for the past few years I stick with that.