Thread: Grouping problem 338LM

Originally Posted by ChrisF

The different tech for running moly bullets , is they seem to need more neck tension due to being so slippery , guys just chuck the necl expander in a drill press and use some real fine wet & dry 800-1200 grit & lightly sand the expander , and knock a thou or 2 off the dia , this means you have a slightly smaller expander , and the neck is a little tighter if that makes sense .


Later Chris

Interesting. Used Moly for years and never had to do much but add more powder to achieve velocity. But use redding bushing dies without the expander to achieve a low runout so that is where I may have not noticed a requirement for more neck tention. Use HBN now and that is a bit more forgiving.