H335 question

[KDX]

So far I only reload for the .223 and 17Rem Fireball. I've only used Benchmark and have had great success with it. I was on Saubier and was reading a sticky for Cooper rifles (posted in 2007 with data from Cooper). H335 is the recommended powder for the 17MkIV, which I would assume to be identical to the 17Rem Fireball. Is H335 a temperature sensitive powder? When I was doing my load development I was going up in 1/10gr increments to find the load my 17 liked. I'll go through that again with another powder, but would like to have one load that is good in the winter or summer and would stick with Benchmark for that reason if H335 isn't temperature stable like the Extreme powders are. As usual....thanks in advance.

 

[ron hilchey]

I have been using a max load of H355 in .233, mainly because of how well it flows and measures. Although I have not cronographed between summer and winter to find variances, I have certainly not seen any pressure signs suggesting that it is temperature sensitive.

 

[martinbns]

I don't think it's an extreme powder, I use it for my 223 with 55 gr bullets. Super accurate, good velocity.

 

[Claybuster]

H335 was the first rifle powder I loaded and have shot it for years in all types of weather and in more than one calibre. From everything I've seen it's not temperature sensitive.

 

[KDX]

Thanks for the replys.

 

[leadslinger]

I have been using a max load of H355 in .233, mainly because of how well it flows and measures. Although I have not cronographed between summer and winter to find variances, I have certainly not seen any pressure signs suggesting that it is temperature sensitive.

x2
25.2 grains pushing 55 grain soft point.
Very very accurate.