Hi guys, I am a newer reloader about 2 years now and I am little paranoid. I load for 7mm-08, 30/06 380 & 38/357. I am having a hard time getting my model 7 7mm-08 to group less than 1.75". A fellow at the range has the same rifle and is getting .5" groups. So he shared his load data and also mentioned that the powder was on sale at field and stream so on the way home I purchased a lb. The powder is H414. After doing some research online the words temp sensitivity came up. Some mentioned using a magnum primer. I called Hodgden about that and they did not reccomend the mag primer but did mention that the powder was temp sensitive. The tech told me a story about going over pressure when hot. So now I am seeking advice.
Other reviews said that the powder in certain calibers showed no sensitivity. What are your experiences?
So here are my questions.
At what temperature should I work up a load? As some may know in Pennsylvania know during our seasons there can be a 60 degree temp difference in a weekend. I would hate to be spot on on Saturday but low on Monday. Or overpressure if its hot. Orrrrrr am I just being paranoid. Sorry for the long post.
Other reviews said that the powder in certain calibers showed no sensitivity. What are your experiences?
So here are my questions.
At what temperature should I work up a load? As some may know in Pennsylvania know during our seasons there can be a 60 degree temp difference in a weekend. I would hate to be spot on on Saturday but low on Monday. Or overpressure if its hot. Orrrrrr am I just being paranoid. Sorry for the long post.