The V block method is the best, but you need a surface table and a set of v blocks with the correct angle for the number of grooves. Seven grooves is common, but so is five. that's at least two sets of blocks,
Fred
Slugging ones barrel, not a waste of time
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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
Re: Slugging ones barrel, not a waste of time
So as a general rule of thumb if the bullet is too small would this cause tumbling?
I've had a few rimfire tumblers and due to the inconsistencies in the manufacture of the bullets this would tie in to me.
I've had a few rimfire tumblers and due to the inconsistencies in the manufacture of the bullets this would tie in to me.
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Re: Slugging ones barrel, not a waste of time
It could, but other factors could cause tumbling. Too slow a twist or too low a velocity for the length of the bullet: these are the usual culprits.
Fred
Fred
Re: Slugging ones barrel, not a waste of time
I'm Dromia's source of amusement at the moment over this and other things shooting related 

Re: Slugging ones barrel, not a waste of time
If you had an AR15 then he'd really make you have it!Dahonis wrote:I'm Dromia's source of amusement at the moment over this and other things shooting related

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Re: Slugging ones barrel, not a waste of time
Remember legally you can only get pretendy ARs in this country, not real ARs.
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