ORIGINAL: bigdawgwill44
My 22-250 has a 1/14" twist barrel. What size bullets would best suit this barrel, 50 gr. 55 gr.?
It is length, not weight, that determines this. For example, my .222 with 1/14" twist did very well with 55-grain flatbased bullets, but poorly with 55 grain spitzer boattailed slugs.... 50 grainers should be OK though.
Greenhill formula: 180/length of bullet (in calibers) = required twist (in calibers).....
So if the bullet is 4 calibers (4X.224") long, the twist must be around 1 turn in 10". How many calibers long are your two different bullets?