Velocity With Plainbase 225 Mold? 556 1/8 Barrel

[psychbiker]

Thinking bout casting for 223/556.

Have a 1/8 twist 556 barrel and a 1/9 556 barrel.

What velocity can I achieve with a 70gr Plainbase? How much would Tumble powder costing help?

Seems that for any 223 cast boolit, a gas check should be used.

[ShooterAZ]

You already answered your own question. Yes, a gas check would probably be a good idea. It would be helpful too if you would let us know what rifle you are loading for. Bolt gun, Ar, etc.

[dtknowles]

I shoot plain base up to 1800 fps from a Hornet with decent accuracy and no leading.

Tim

[psychbiker]

Ar. 16 and 18 barrel.

[runfiverun]

plain base will not be your friend.
look in the military rifles section and at beagles write-up in the cast pics section.
there are some tips [and threads] in both areas that will help get you going.

I shoot cast in both 8 and 9 twist AR rifles, the accuracy is good, the velocity is in the 2800 fps area, the work to do it is not fun and is time consuming.

[upnorthwis]

Being as tight as I am I tried the no gas check route to save 3 cents/boolit. Couldn't keep them within minute of berm. Rifle: AR-15, 1/9 twist. I did get it to shoot good enough for what I'm doing, (2-1/2 MOA for 3-gun) but it's Plus 1 on not fun and is time consuming.

[berksglh]

Ive been messing with the Lee Bator mold for my 9 twist DPMS 3G2 AR. Just started powdercoating but using a gas check as well. Accuracy is fine for shooting swingers, but the bullet is too short and small for my guns throat. I puonded a soft lead slug to measure my throat and came out .229" just in front of the case.

To get closer to lands and fit tighter in throat i just orderd a NOE 228 72Gr. RN 4 cavity GC last night. Got a lead pot thermometer, mold drilled for temp probe and ordered their temp probe to try to be as consistent as possible.

If i can get it to 1.5"@ 100 it will be wort it, but that's to be seen yet.

[19ellis93]

Ive been messing with the Lee Bator mold for my 9 twist DPMS 3G2 AR. Just started powdercoating but using a gas check as well. Accuracy is fine for shooting swingers, but the bullet is too short and small for my guns throat. I puonded a soft lead slug to measure my throat and came out .229" just in front of the case.

To get closer to lands and fit tighter in throat i just orderd a NOE 228 72Gr. RN 4 cavity GC last night. Got a lead pot thermometer, mold drilled for temp probe and ordered their temp probe to try to be as consistent as possible.

If i can get it to 1.5"@ 100 it will be wort it, but that's to be seen yet.
I know it's a little off topic and a small hijack....I apologize for it now but how deeply are you seating the bator bullet?

[berksglh]

Less then one diameter. COL 2.125"