Two things that occur to me, one is if the chamber has a short throat or is wrongly head-spaced so when the case expands on firing the neck hits the front of the chamber.
The second is if the die is incorrectly set or the case is too long and it's being slightly compressed during sizing. I can't see any way tumbling would give that effect.
Using stainless steel tumbling media
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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.
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phaedra1106
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Re: Using stainless steel tumbling media
There's room for all Gods creatures, next to the mash and gravy :)
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gw280
Re: Using stainless steel tumbling media
I have a deburring tool, like this one, which I've been using to try and remove the lip. It leaves a little bit of a chamfer on the outside edge, which I believe is sub-optimal, but probably better than having the lip there. I may trim them as well.ovenpaa wrote:The second view does appear to show a very slight lip on the outer edge of the mouth. Do you have an external chamfer tool you can just gently run around the outside to clean it up?
Re: Using stainless steel tumbling media
The deburring tool will add a chamfer which is fine as long as it is in moderation, I finish mine off with a worn out green kitchen scourer which is slightly dampened, it removes any burrs and rough edges and I much prefer it to wire wool.
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