Barrel twist question
#2
RE: Barrel twist question
http://www.riflebarrels.com/products/caliber_twist_rates.htm
According to that link with a 1:14 twist you want 50-52grs.
According to that link with a 1:14 twist you want 50-52grs.
#4
RE: Barrel twist question
ORIGINAL: bigdawgwill44
My 22-250 has a 1/14" twist barrel. What size bullets would best suit this barrel, 50 gr. 55 gr.?
My 22-250 has a 1/14" twist barrel. What size bullets would best suit this barrel, 50 gr. 55 gr.?
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?
#5
Typical Buck
Join Date: Feb 2004
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Posts: 809
RE: Barrel twist question
ORIGINAL: eldeguello
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?
ORIGINAL: bigdawgwill44
My 22-250 has a 1/14" twist barrel. What size bullets would best suit this barrel, 50 gr. 55 gr.?
My 22-250 has a 1/14" twist barrel. What size bullets would best suit this barrel, 50 gr. 55 gr.?
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?
However, the base plays more of an obstickle than realized in some cases!
And in my opinion it has to do with blow by(or seal), from the case?
Spitzer bullets seem to have a disadvantage as far as speed and accuracy because of inconsistancy of seating the bullet when fired? Again this is my 2 cents? But I have found that Spitzer type bullets seem to diffeaint for accurracy when pushed to the limit of speed on fast burning powder rates?