Need a bit of help identifying the boolit shown in the pic?

It weighs in at around 170 and with the check in place, around 174?

I am thinking it is a 311291 and that is the data I used figuring the weight of the boolit?

I got about 50 of them in a box labeled. ?30 caliber cast? from a bunch of reloading stuff I purchased some time ago?

Thought I would just give them a try in the T/C 14? thirty-thirty cartridge?

Just with this limited testing, it is outshooting the 311041, at least, at the 50 yard range?

I like the results. Those groups are at 50 yards?

The one on the left is with 30.0 grains of IMR-7383 and it is right at 0.4? center to center?

The one on the right is with 35 grains of IMR-4831 and it is right at 0.5? center to center?

I?m sure glad I took that 223 Remington barrel off of this Contender frame. Nothing but lousy with the .224 boolits?
(But, it is a real shooter with 50 V-Max)

Thanks?BCB