Thread: .22TCM Micro Varmint rifle build

Originally Posted by rossi.45

i am curious myself on how the 50grn bullets will work, i think the 55s will be to slow for Varminting but maybe good for Goats etc . . . lookn forward to your results to find out

be interesting to compare 40 vrs 50s once you have the data . . . will the higher velocity give the 40s the edge on paper and in the field at longer range . . . so much to look forward to.

the thick neck on the TCM is a worry . . . i would be looking at neck turning with a chamber to fit them

Not really a worry but a annoyance meaning annealing before every load.
Personally if I was to bother neck turning and having to have a custom chamber reamer made to suit the new neck dia, Id be looking at making it .20cal and 40deg improved at the same time. That would be the perfect calibre in this little hot rod, the same weight bullets only faster with a higher BC.

Originally Posted by Wingman

Not really a worry but a annoyance meaning annealing before every load.
Personally if I was to bother neck turning and having to have a custom chamber reamer made to suit the new neck dia, Id be looking at making it .20cal and 40deg improved at the same time. That would be the perfect calibre in this little hot rod, the same weight bullets only faster with a higher BC.

This would be a very cool round as a 20 Cal. Not sure I'd go with a 40 degree shoulder just for feeding considerations, maybe 30 degrees and shorten 20 Tactical dies? I have thought about doing a 20 Vartarg but this could be a better option. I have a 20 Tactical reamer and a barrel on the way for it

Originally Posted by The Claw

This would be a very cool round as a 20 Cal. Not sure I'd go with a 40 degree shoulder just for feeding considerations, maybe 30 degrees and shorten 20 Tactical dies? I have thought about doing a 20 Vartarg but this could be a better option. I have a 20 Tactical reamer and a barrel on the way for it

Here it is in .20cal



I agree that would be a great cal but a bit more faffing around with neck turning and fire forming etc.

Your best bet would be to have a custom reamer made and just open up the top of some Redding .22 TCM dies for a .20cal neck sizing collet.
The case wouldnt fit into any cut down dies as it is the bottom of a .223 rem case so much wider than the top section.


Edit: just found a forum where someone has made one

http://www.saubier.com/forum/showthread.php?t=27048