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308 subsonics
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<blockquote data-quote="Huckelberry75" data-source="post: 2359821" data-attributes="member: 7489"><p>If you are throwing subs, then your speed limit is about 1050. If you can only go so fast, then you should throw the heavies. I shoot a 20"/10tw and run the 208 amax with 12.5gns and the 220 RN Prohunters with 12.2gns of Trailboss in LC brass (no primer mods). Typically getting ~1moa @ 100 with them, but about a foot lower than my standard loads. The 208's are right at or just a touch above the SB, but to stabilize the long skinny projo, I have to run it just a bit faster. You want to stay away from spitzer boattails, especially with a 12tw bbl. You should try the 150/170 FN bullets for the 30-30 or the 180 RN prohunter. You are looking for as short of a projectile as possible to increase the stability factor. Optimal twist for 308 subs looks to be a 7 or 8 twist bbl (look at 300 blkouts), although I know of some 7.8 & 8tw bbls on .308Wins built by Surgeon that according to the owners shot "lightsout". A chrony is awfully handy, but not essential, and <strong>if you dont have a supressor, it's all a waste of your time</strong>. if you do, be sure to shoot them w/o a can first to verify that they are stabilized. Look for oblong or key holes in the paper. You want nice round holes, which indicates that they are adequately stabilized and going into the target "pointy side first".</p><p>You are better served to start too fast and work your way down in powder charges, b/c a stuck bullet in the barrel can wreck your day if you don't know that it didn't exit. Check after every shot if you don't see/hear impact and invest in a piece of steel all thread and wrap in electricians tape from homedepot/lowes for knocking out "stucks", if you can find a bit of solid brass rod instead, all the better. Cheaper than replacing the nice cleaning rods that will snap when you get to hammering on them.</p><p></p><p>Have fun, and let us know how it goes for you.</p></blockquote><p></p>
[QUOTE="Huckelberry75, post: 2359821, member: 7489"] If you are throwing subs, then your speed limit is about 1050. If you can only go so fast, then you should throw the heavies. I shoot a 20"/10tw and run the 208 amax with 12.5gns and the 220 RN Prohunters with 12.2gns of Trailboss in LC brass (no primer mods). Typically getting ~1moa @ 100 with them, but about a foot lower than my standard loads. The 208's are right at or just a touch above the SB, but to stabilize the long skinny projo, I have to run it just a bit faster. You want to stay away from spitzer boattails, especially with a 12tw bbl. You should try the 150/170 FN bullets for the 30-30 or the 180 RN prohunter. You are looking for as short of a projectile as possible to increase the stability factor. Optimal twist for 308 subs looks to be a 7 or 8 twist bbl (look at 300 blkouts), although I know of some 7.8 & 8tw bbls on .308Wins built by Surgeon that according to the owners shot "lightsout". A chrony is awfully handy, but not essential, and [B]if you dont have a supressor, it's all a waste of your time[/B]. if you do, be sure to shoot them w/o a can first to verify that they are stabilized. Look for oblong or key holes in the paper. You want nice round holes, which indicates that they are adequately stabilized and going into the target "pointy side first". You are better served to start too fast and work your way down in powder charges, b/c a stuck bullet in the barrel can wreck your day if you don't know that it didn't exit. Check after every shot if you don't see/hear impact and invest in a piece of steel all thread and wrap in electricians tape from homedepot/lowes for knocking out "stucks", if you can find a bit of solid brass rod instead, all the better. Cheaper than replacing the nice cleaning rods that will snap when you get to hammering on them. Have fun, and let us know how it goes for you. [/QUOTE]
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