H4350 vs. IMR 4350

[bdbrown66]

Loading for .22-250, .243, and .30-06. Which powder, and why?

I've heard that H4350 is very temp stable, and load data seems to show lower pressures compared to other powders. However, I have no experience with either one. Give me your recommendations.

Thanks in advance,
Brian

 

[6mm Remington]

Both are great powders Brian. You are correct in that H4350 is supposed to be a bit more temp stable than IMR4350. That being said, IMR4350 is what I use in my 6mm Remington (very close to your .243), and my own 30-06. It has worked very well for me in all conditions from hot weather to extremely cold, way below zero.

30-06 : 165 gr. AccuBond or Partition 57.4 grs. of IMR4350 - Winchester brass - Federal 210 match primer. (This load has worked very well in two 30-06 rifles I shot them in. Of course work up to this in your rifle.)

David

 

[EastTNHunter]

The Hodgdon temp stability thing is way overstated, especially in 4350, but H4350 is a great powder for .30-06 and .243. So is I4350; some rifles use both well, while others show a preference for one over the other.

4350 is a bit slow for.22-250, and you will likely run out of room before reaching max velocity, but I have heard reports of great accuracy in some .22-250s. Try H380, which was literally developed for the .22-250, Varget, RL15, or 4064. All of these work great for the .22-250, but also do very well in .30-06 and .243.

 

[bdbrown66]

The Hodgdon temp stability thing is way overstated, especially in 4350, but H4350 is a great powder for .30-06 and .243. So is I4350; some rifles use both well, while others show a preference for one over the other.

4350 is a bit slow for.22-250, and you will likely run out of room before reaching max velocity, but I have heard reports of great accuracy in some .22-250s. Try H380, which was literally developed for the .22-250, Varget, RL15, or 4064. All of these work great for the .22-250, but also do very well in .30-06 and .243.

Yeah, I've got loads for all 3 with 4064. It's been my go-to powder for years. But variety is the spice of life.

 

[EastTNHunter]

If that's the case then I'd go with the I4350 due to availability. H4350 seems to dry up quicker and come to market later than the IMR

 

[str8meat]

my kids weatherby vanguard loves h4350 with any bullet in 243. imr not so much

 

[joelkdouglas]

I have used both quite a bit for several 30-06s, and both are very useful. If forced to choose I would pick H4350, but only because I travel to hunt and sometimes I live somewhere difficult to work up a load for expected conditions. For instance, for a couple years I lived in Las Vegas heat and went to Utah for elk at -5 degrees. If I didn't travel either would be fine. A really good aspect of IMR4350 is it's really a safe powder for the 30-06, you run out of case capacity before pressure gets too high.


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[Cleveland48]

I really like H4350 but it has turned to unicorn pellets in a lot of places. I have not seen any on the shelf in over a year at my local shops. I will be working with IMR 4350 soon to try it out.


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[Silent Sam]

I went with IMR4350 because it was available and haven't had a reason to switch. I did try H4350 in a couple of calibers but the results didn't induce me to change. Recently I have made an effort to reduce the number of powders that I use just to simplify my life. IMR4350 is one that I'll continue to use. I use it for 243, 257R, 30-06 and 338WM. The oft repeated word is H4350 is more temp stable. I really can't say but i've never had an issue with IMR4350 from below zero to 80+ degree temps.

 

[Darkhorse]

IMR 4350 is now the only rifle powder I use. I live in central georgia where the temps get real hot and the humidity is almost always 100% in late spring and summer. Most of my load work is done this time of the year for a fall elk hunt where it's sometimes sub zero. I've never had a problem and think most talk of IMR 4350 being temp. unstable is overstated.