Got my mould from Accurate moulds. Ordered a 4 cavity with 2 cavities to drop the 51-320S and 2 cavities to drop a modified 51-350S
Had them modify the 51-350S by removing the crimp groove to facilitate crimping the round to achieve an 1.6" OAL.
Sized to .512 and lubed with LBT Blue.
23.5 grains of 4227
Still need to put it on paper but took it to my local NCOWS match Saturday and only had 2 misses off hand with 12"X18" targets at @60 yards. Both times most likely my fault and not the rifles.
Need to take pictures the next time it happens for clarification but locked the action up twice. Both times I was cycling the lever fairly fast and I suspect it may have been too fast. To get it unjammed I had to remove the magazine plunger and push the round back into the mag tube before the lever would move. Next time it happens I'll stop and take pictures.
Here are two videos of me shooting it. Sorry about the huge grin I couldn't help myself.
This video ended up in two parts.