Originally Posted by Indy Bob
I may know the answer to this question about the bolt very hard to lift up on my 22-250 after only "SOME" rounds are fired. (Is it too much pressure?????).
What is faking me out is the fact that I am loading 10% lower than the books say for H-380. My loads were 34.5 gr of H-380, 53 gr.Hornady Match HP, CCI LR primer. I weigh my power to 1/10 gr. (balance beam ... I am VERY picky to have it right on).
I used a gauge to measure the bullet in relationship to the grooves in the rifling and the bullet is "just touching" the grooves. Brass is fire-formed and only neck sized. I have also used a flash-hole reamer to eliminate poorly punched flash-holes.
I know there are more modern powders now ...... but I have used H-380 years before ..with that same load recipe. My rifle was not used much at all so this load is one I have used years before. I may ??? have had some of that problem back then
What are other variables that might be causing my problems.
Does anyone have a suggestion for a different powder for this 22-250 and the 53 gr bullets?
Sumpin ain't right here! Typo I hope! Your load of 34.5gr is almost 4gr below Min
. If that is truly your load, your are treading on dangerous ground. Going that far below Min can be just as dangerous as going way over Max.
bullet is "just touching" the grooves
This will surely increase pressures as the published data most likely allowed for plenty of jump to the lands. Loading up close will give Max pressure in any chamber.