Max velocity for .308 170gr gas checked boolit

[ace1001]

Saeco flat tiped mold I use and love for 30-30.
What alloy and charge would you recomend. My rangefinding and calculator scope only goes as low as 2700 fps so I would like to go that high. I have only gone to 2400 in 30-30. Ace

[mike in co]

ok, i'll bite.
why would anyone put such a scope on a short range 30-30............

mike in co

[Doc Highwall]

Also a scope like that would have to have a bullet with a B.C. within a range that the scope was designed for at 2700 fps to work properly.

[jhalcott]

That's a hot load for the 30-30,2700fps with a 170 grain bullet! You can get there in the .308 with RX7, 748 and 3031. You MIGHT need an alloy of 16bhn or harder and a very good lube. I would consider the 30-06 and linotype alloy with the gas check. You might also just go with the condom bullets to save the frustrations encountered with this type of endeavor!

[ace1001]

Let me clarify, I HAVE been loading 30-30, but never over 2400fps. Not bad to 220M Iron sights 26 inch barrel.
Now I want to load .308 and use a Burris Eliminator Ranging Scope on a Keltec RFB. If I shoot at a silouette range, I must shoot unjacketed lead at ranges to 600M. The scope needs 2700FPS as its slowest calibration. Can that be done? Will it plug the gas port?

[Larry Gibson]

ace

consider this; the .308W with a 168 bullet just pushes 2700 fps within SAAMI pressures. Now you want to do the same 2700 fps with a 170 gr cast bullet outof a gas gun with a 22" barrel? Maybe if you had a bolt gun with a longer barrel and a 14" twist you might get there. But having already tried that I doubt it. Check out my thread on the 311466U (153 gr) out of my 27.5" barreled Palma rifle. I'm pushing right at 2600 fps with very good and consistent accuracy. I've worked the Lyman 311041 in that same rifle and with a compressed load of Varget pushed 2600 fps but the accuracy with that design of bullet was not there. It is even worse in 10 and 12" barrels. I might asdd that at 2600 fp the BC was .2 (the BCs drop off quite a bit with FPs as velocity increases) and even at 2700 fps the bullet might stay sonic to 500 meters but not to 600 meters for sure.

Quite frankly I doubt you will get there from here with your rifle and that bullet:(

Larry Gibson

[Bret4207]

2700 fps with a 170 cast in the 30-30? Not gonna happen.

[ace1001]

Again, it is a bullet designed for 30-30 in .308. How about my BATOR .223 cast bullet in a .308 plastic sabot. I know I can get the velocity, but will it run the action? It will hardly leave a mark, and there is a question about accuracy. I find that the people who hate them load them too hot. Sooo, I could load them to fly like a jacketed .308. Has any one EVER gotten good accuracy from a GC lead boolet in a military barrel or similar twist, at 2400+FPS.

[ace1001]

I went through old posts, seems that 2700 fps is beyond the best accuracy and pushing the limits for lead. I was very happy with 2400 fps in 30-30, in a 26 inch barrel. It is a good case for lead. Was designed for it. Long neck to seat a long boolit and not a lot of empty space to have to fill with dacron.

[Larry Gibson]

Ace

Twist of that 30-30 26" barrel?

Larry Gibson

[ace1001]

It is a 94 Winchester.

[ace1001]

I believe it is RH 10" twist.

[ace1001]

The gun and cartridge were designed together for smokeless powder and a lead, metal patched bullet. Exactly what we are doing here. Ace

[Larry Gibson]

It is a 94 Winchester.

If a Winchester M94 it is a 12" twist.

Larry Gibson

[ace1001]

If that is what the Octagon 26" barrel is.

[Larry Gibson]

If that is what the Octagon 26" barrel is.

Winchester has always used 12" twists in their M94s.

Larry Gibson

[ace1001]

The ones they are building now for Oliver Winchester's 200th birthday have a 1 in 10" RH twist. Only $1200.00 Don't know where they are built. Maruku in Japan probably.

[Shiloh]

2700 fps with a 170 cast in the 30-30? Not gonna happen.

+1

Don't think this is achievable with a .30-30

[ace1001]

I think I will try my successful 30-30 charge and bullet in the .308 at 2400fps aprox. It may not work with the 10" twist of the RFB and it may foul the gas port quickly and I will have to compensate for being slower than the scopes balistic calculator. Plan B is use the .223 Bator bullet in a sabot loaded to .308 velocity as a training round. I'm liking plan B best. Ace

[Bret4207]

My apologies, I missed the 308 reference. 2700 fps is really pushing things with cast. It would call for absolutely perfect boolits, perfect fit, a fine lube and slower powders. You're going into Phd. level cast with this.

[Moonie]

ace1001, might try paper patching, 2700 should be doable, some are pushing a bit farther than that.