Take this advice from someone who has experimented. I have also used Red Dot under a 168 SMK for some ultra-quiet sub loads but I would be VERY careful with such a fast burning powder. Sierra 150-grain Pro-Hunter bullets and Trail Boss fired from a. They will be quiet but won't even make the BCG move. The subsonic loads hit a couple feet below point of aim at 100 yards. Trailboss (or SR 4579?) are your options. ![]() a buddy uses a low velocity charge of trail boss he claims is quieter. The powders you have will not provide enough case fill or the correct burn rate for subsonic 308 Win. Imr list three sub sonic loads trail boss, titegroup and cant remember need to lock it up I have and still do use titegroup 8 g with speer 165 in a 20 inch barrel They are not dead quiet but do not alert the neighbours. I dont, but I doubt youll have any problems finding a sub sonic load with 170s and Trail Boss. But it would beat itself to death with any sort of full-power rounds. I am sure that you could mod a 308 AR to cycle, somehow, with an ultra short gas system and large gas port to do so. The 308 AR platform has a significantly stronger action spring, much heavier BCG, and requires much more force to strip rounds from the magazine, all of which make it impossible to cycle with subsonics. If you have played around with 300 BLK subsonics, you would see that they provide VERY little energy to cycle, even for a AR-15 action. 22 LR RAR with the Sparrow mounted is stupid quiet with the CCI Quiet ammo (756 fps) and still very quiet with CCI subs.Unfortunately I am sure that the goal of a subsonic 308 Win that cycles will ultimately be fruitless. Some people say to drill-out the primer pockets to 9/64', but I didnt on the ones I loaded up for my buddy. I just made some for my buddy to shoot suppressed in his rifle. I picked up a can of Red Dot in a trade to try and work up some of the 90 grain loads but haven't found my "roundtoit" yet. You will have to work up a load for yourself to find out what stays subsonic in your rifle. It will also function with semi auto platforms, but will likely require manual cycling of actions. This load has been thoroughly tested to function with bolt action rifles. The 90 XTP over 4-5 grains of Trail Boss is supposed to be stupid quiet and good on smaller animals out to 50-75 yards. The Discreet Ballistics 308 Win 190gr Subsonic Target Load was conceived and designed as part of a two load system. I've shot the 190 Sub-X out of a suppressed RAR in 300 Blackout, quiet but not what I'm looking for. Some people say to drill-out the primer pockets to 9/64', but I didn't on the ones I loaded up for my buddy. If possible a 300blk would be a lot simpler set up for subsonic in. I hand trickled all of these loads individually. I had good luck with trail boss (doughnut shapes fill cases better) and I think unique in the 45-70 I don't think I tried any others. ![]() I just made some for my buddy to shoot suppressed in his rifle. I'll change it out eventually but def keep a close eye on subs with jackets. Trail Boss is impossible to find and according to Hodgdon won't make the production schedule until next year. You will have to work up a load for yourself to find out what stays subsonic in your rifle. A 12 gauge Lee slug can be downloaded to around 1,100 fps at the muzzle and would put some hurt on a hog out to 50 to 75 yards. 2,414 Powder choices for subsonic 308 I have a user-serviceable silencer that I shoot a lot of 300 blackout cast through. Handloads, and faster-burning powders like HP38 and Trail Boss can be used for. Max loads to 1,400 fps.ĭidn't see anything heavier / slower, but didn't look that hard either.Įdited: Not sure what bullets would reliably expand at that velocity. Remington Subsonic Loads (Hodgdon data) reloading data with 3 loads. 308/trailboss is 10grs, hoping that there is a margin between 70 and 10grs in case velocity is too high, particularly when not using the bullet in the load data. ![]() Lapua Virgin brass BR-2 Primer 11.0 Grain of Trail Boss 170 Grain Round point 30-30 bullet. There is load data for 150 grain bullets in 308 using Trail Boss. Have not done the testing yet, but manufacturer states 70 case fill minimum, and the only published load Ive seen for. I found out that 10 grains of Trail boss with a 170 Grain Sierra 30-30 bullet is VERY accurate at 50 and 100 yards, sub MOA at 50 yards and MOA or a bit better at 100 yards.
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