Subsonic 308Win Question

[Punisher29073]

I am working on a subsonic load for my 308. Using Trailblazer powder and 200 gr SGKs, could using regular large rifle primers cause horrible vertical stringing? I mean like 1 foot random vertical change at 100 yds. I stuffed cases with mylar to keep the powder at the rear of case.

Ryan


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[culater]

That your issue is the mylar. Fill you case with only trailboss and call it good. If your getting a 1 inch group you should call it good . Also try a lighter bullet

 

[Mullhead]

11 to 11.5 grains of trailboss is all you need. Mylar.. really? Never heard of that and I've shot a lot subs. I'd toss the brass and scrub the barrel. Remember start high and work low. No need for magnum primer or drilling out flash hole. Nosler has a new bullet out 220 gr. expander at 1000 fps. Nosler part #30181.

 

[Punisher29073]

Correction - poly-fil stuffing is what i used. Not mylar. Not sure where that came from. I was using 8.8 grs. Maybe charge was too light. I have a bunch of these SGKs so i would like to use them. Thanks.

Ryan


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