Subsonic 308 1-12 Twist

[callen3615]

Soliciting advice for 308 subsonic loads for a specific rifle of mine. Cut down 18" Remington SPS 1-12 twist rate. I have an Omega 300 in jail that should be free in a few months. The barrel is not threaded. I am trying to figure out if it is worth getting threaded, or should I just rebarrel it to a faster twist rate. I dont foresee me shooting subsonic loads very much, but it would be nice to have a 100 yard and in hunting setup that is quiet. I handload 168-178 bergers and hornadys for it, it doesnt seem to have any issues stabilizing the 178s, but thats at @2500 FPS, 1000FPS will be another story.

Thanks for the help

 

[morning would]

I am only guessing based on my 18” 1:10 and the fact that I shoot a lot of 308 subs, so take this for the price you paid for it.

I would get the 168’s or some 175’s going about 1050 and see what happens. For me, and the 175 RDF’s I use, that’s about 10.3gr of trail boss. I usually shoot 125TNT’s as my go to. I like seeing a 308 going 3k FPS for some reason. Anyways, that means my come up with subs at 100 is about 3.3 mils. At 200, it is 8-ish. Don’t have my dope in front of me. I have shot up to 200gr ELD-X’s, but they didn’t group well. They did stabilize though just fine. 190SMK’s shoot really good, I’m just out of them right now. Moral of the story, if my 1:10 will stabilize up to a 200gr bullet, I gotta believe your 1:12 will shoot a 175 just fine at sub speeds. I’d grab a box of 175 SMK’s and a box of 175 sub-x’s and see what happens. All you can do is test it. Without the can on first, of course.

 

[callen3615]

I kind of figured that is the response I would get. I do not have an excuse to not try it. I have plenty of 175 SMK’s laying around. Are you loading them tip out? any buffer in the case? Thanks

 

[morning would]

Tip out and no buffer. Have not tried them backwards. For me, there hasn’t been a need.

 

[culater]

I would look to the 160gr FTX for subbing.

 

[Gunfighter14e2]

Soliciting advice for 308 subsonic loads for a specific rifle of mine. Cut down 18" Remington SPS 1-12 twist rate. I have an Omega 300 in jail that should be free in a few months. The barrel is not threaded. I am trying to figure out if it is worth getting threaded, or should I just rebarrel it to a faster twist rate. I dont foresee me shooting subsonic loads very much, but it would be nice to have a 100 yard and in hunting setup that is quiet. I handload 168-178 bergers and hornadys for it, it doesnt seem to have any issues stabilizing the 178s, but thats at @2500 FPS, 1000FPS will be another story.

Thanks for the help

A 12 twist is plenty for most anything 175gr & under for 100 yds & in. Worked a load for a buds AI using the 175smk and Trail boss years ago, and 1/4 moa was easily achieved at 100. At about 150yds a 175smk in a 12 twist will start going end over end. Funny to watch in the glass as it travels on to a 250yd target. Your 12 twist will work to 400 yds+ if you use a round nose. I shoot a 217 Lyman cast @ 1080 Mv and she will do 600 nose on w/o issue, but now I'm using a 10 twist in a 16.5" tube. The farthest I shot a 12 as norm was 500 but I shit canned that stick for this new lite one. Have no doubt the 12 will do the same thing.

A dedicated lite 308 sub gun is a handy tool, when it can be used day or night.

 

[D̷e̷v̷i̷l̷D̷o̷c̷A̷Z̷]

Soliciting advice for 308 subsonic loads for a specific rifle of mine. Cut down 18" Remington SPS 1-12 twist rate. I have an Omega 300 in jail that should be free in a few months. The barrel is not threaded. I am trying to figure out if it is worth getting threaded, or should I just rebarrel it to a faster twist rate. I dont foresee me shooting subsonic loads very much, but it would be nice to have a 100 yard and in hunting setup that is quiet. I handload 168-178 bergers and hornadys for it, it doesnt seem to have any issues stabilizing the 178s, but thats at @2500 FPS, 1000FPS will be another story.

Thanks for the help

I run subs in a 1:10 twist not a problem.

The most difficult part is finding powder.

 

[Gunfighter14e2]

The most difficult part is finding powder.

I switched to fast pistol & shotgun powders long, long ago & they work perfect. Though double charging could happen if you're not careful. While getting small SD & ES numbers is much harder with jacketed, not so with cast. If you gas check them you can switch back & forth w/o issue if need be.

 

[D̷e̷v̷i̷l̷D̷o̷c̷A̷Z̷]

I switched to fast pistol & shotgun powders long, long ago & they work perfect. Though double charging could happen if you're not careful. While getting small SD & ES numbers is much harder with jacketed, not so with cast. If you gas check them you can switch back & forth w/o issue if need be.

I’m not the guy asking questions. Lol

My load is 8SD with TB

 

[Gunfighter14e2]

I’m not the guy asking questions. Lol

My load is 8SD with TB

Understand, but TB dried up around here long ago the reason many of us switched.

 

[D̷e̷v̷i̷l̷D̷o̷c̷A̷Z̷]

Understand, but TB dried up around here long ago the reason many of us switched.

You tell no lies. What powder are you guys using now?

Here’s an email a buddy got back on Dec 22

They claim it’s going to return but not anytime soon

 

[Gunfighter14e2]

What powder are you guys using now?






View attachment 8374084

For general use on steel its Red Dot, as it meters well in most throwers. For one & done 700X for most of us, but it meters like shit. When using 700X most of us are using a lee dipper then tricking up, almost as fast as a thrower. A few are using Clays or Silhouette. I like Bullseye as well. Most all do 700X past 400 & and everyone does past 500 to 600
The 217gr cast many shoot, has as much retained energy at 600 as a 38 special at the muzzle, but requires 93 +/- moa over a 100yd zero.

 

[callen3615]

I run subs in a 1:10 twist not a problem.

The most difficult part is finding powder.

That’s what I’m quickly realizing