Strange happening!!
In my ruger .22-250 i have been loading 33gr of winchester 748 with a cci magnum primer and a sierra 52 grain hollow point. I shot a group of 5 and then zeroed in. I also shot a varmit or two in between. And then another grouping the other night. Basically i have shot this load 16-18 times. Everything was fine, groups great, no signs of pressure, ect. Last night i shot same load and the case ejected very black, the neck was covered and a majority of the case. Wasnt sure of the problem so i fired another round. Same thing very black. The residue wipes right off but i haven't seen anything like this before. Any thoughts on what this could be. I have shot this load several times and no problem. I realize that the 33gr is near the bottom of loads recommended, and powder usually burns dirty at the low end, but i am using the magnum primer. Any input would be greatly aapreciated. Thanks Ryan
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Hello IMHO your load is not generating pressure to expand the case to the chamber walls and you are getting blow by my suggestion is to use a faster burning powder to load if you want reduced velocity loads. 0 -
Has the weather moderated since the 'blackening cases' started ? 0 -
pressure too low. More powder or faster burning powder. 0 -
Step it up and loose the Mag primer it's not really needed with that little bit of powder unless it's a hummer as far as groups go..... 0
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