6br 8 Twist 107 Sierra SMK
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I am struggling to get this bullet to work. I am using Lapua brass, CCI450 primer,Varget Powder. I am reaching out to see if anyone has some experience with this combo. I was working at .010 0ff . Does this bullet like more jump or should it be jammed. Any help or suggestions would be greatly appreciated.
Thanks
Tom
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SMK's tend to be jump tolerant. I would say you should try a different powder. H4350 perhaps? H4895?
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While not ideal, RL15 is a pretty common powder to run in the BR's. I'd try H4895 or a different bullet.
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I was off today so I went to range. Shot a OCW with the 107 SMK at .025 off. I am using Lapua brass and CCI 450 primers.
The 105 are Barts. Today I shot them jammed same brass and primer. Both with Varget powder. The 107 have something around 29.6 maybe play with seating depth. Any comments are appreciated.
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switch powders. If that doesn't show some promise, that bullet just won't work in that rifle.
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@orkan maybe I need to switch bullets. My barrel is 24 inch long 8 twist. Should I try a lighter bullet like the Berger 95 VLD ?
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My 7.75 twist benchmark shoots 95's really well.
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@orkan ordered some Berger 95 H VLD. I see your load at 31.2. Where did you start powder wise? My next question is bullet seating. Are they jammed or .010 off lands? Thanks for the help.
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http://www.primalrights.com/articles/load-development
I used my 6BR in that article. Should be able to find all the info there. I ended up at .085" off the lands.
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@orkan nice write up. A lot of good info. I do most of the items. I use a homemade comparator. I ordered the kit today. This is the first gun I have struggled with to find a load. I guess I have been lucky. I am on a mission now, so I will get it figured out eventually. Thanks for the help. I have done a lot of reading / research.
