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#1
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20 Practical_39gr SBK
Trying to find the most accurate load, currently using IMR8208 and curious to know how deep everyone is seating the 39SBK? My barrel has a long throat and bullet just sits inside the neck when touching the rifling. Looks like I can seat the bullet just enough to get at least a .040" jump.
Savage M12 Action Criterion 26" 1:11 Weaver T36 |
#2
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Both the 40vmax and 39bk worked best for me around .010"-.020" off, but with a long throat you're just going to have to find the decent jump lengths. Don't be afraid to make it jump a bunch, if it works, who cares? Not the target.
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#3
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Have you loaded it to magazine length and pulled the trigger yet? You might be surprised.
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#4
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My 20p is an AR, so magazine length restrictions. Nosler 40@ 2.210 coal
Berger 35 @ 2.167 coal(these I have currently in ammo box for coyote) My notes Sierra @ 2.150 was touching the lands but I don't have any loaded to check. Nosler I'm running, 0.025 off lands. So I would start 2.125 with the Sierra in my BHW barrel. I'm about 0.080 off with the Bergers. |
#5
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No magazine in this build, single stack/blind mag.
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#6
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I have another load worked up just seating the bullet enough to maximize case neck and still have a little room left in the shoulder, not much. Neck length is about 0.210" give or take.
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#7
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I jump j.010 on the bolt gun, same as the AR version. My reamer has zero freebore. Who did the barrel job and why is there so much freebore?
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