Powder question

[sean1]

I have a sendero in 25-06. Made some loads up with h4831 and R22. 110 accubonds and 115 vld's. R22 and vld did really good. .63 at 200 yards. I am very happy with that accuracy.

My question is about the R22. I hear some talk about that powder not being suitable for extreme temperature swings. Would this be noticeable out to 4-500 yards? What does it do? Point of impact change? Groups swell ? Any of the above? Am I over thinking all this? Thank you for your time

 

[Joe King]

depends

If your like me and only go to the range, during the summer months when the sun is coming up, and home by 10 (trying to keep my shooting a 60deg F. or lower), then I think you should be ok during fall. But if you do your shooting at any givven time of day all year round you'll see some differences. Keep notes of ambient temp and time of day you shoot running a few at a know range will answer your question.

 

[sean1]

Thanks for your response. Well since my data came at 40 degrees I would think I should be good for the fall. A little curious about 0 degrees if I start filling crop permits in January. But I should shoot the rifle to test it if the temp gets that low

 

[Joe King]

shoot single shot and keep the rest in your shirt pocket, I been doing that for years but just because my oal is to long for my magazine

 

[sean1]

Also read another post about putting a few rounds in the freezer and some out in warm weather just to see the difference at extreme differences

 

[Lefty7mmstw]

Also read another post about putting a few rounds in the freezer and some out in warm weather just to see the difference at extreme differences

put your rifle in the freezer too if you want valid numbers.