Preparing .303 Brass

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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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bradaz11
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Re: Preparing .303 Brass

#11 Post by bradaz11 »

If it's doing that in the collet die then it looks like it's not entering the collet.
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TattooedGun
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Re: Preparing .303 Brass

#12 Post by TattooedGun »

Hmm, looking into this a little further, someone else had the same issue witha .223 lee collet sizer, and he reckoned that it was something to do with ramming the press into the collet die with no cartridge causing the collet fingers onto the mandrel...
http://www.predatormastersforums.com/fo ... Post259163

Not sure this applies here... but similar looking photos of the issue.
nfarmer

Re: Preparing .303 Brass

#13 Post by nfarmer »

TattooedGun wrote:Hmm, looking into this a little further, someone else had the same issue witha .223 lee collet sizer, and he reckoned that it was something to do with ramming the press into the collet die with no cartridge causing the collet fingers onto the mandrel...
http://www.predatormastersforums.com/fo ... Post259163

Not sure this applies here... but similar looking photos of the issue.
That is interesting, I'll have a look at my die but as the problem was intermittent I suspect it isn't the answer. Will report back.
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Re: Preparing .303 Brass

#14 Post by bradaz11 »

nfarmer wrote:
TattooedGun wrote:Hmm, looking into this a little further, someone else had the same issue witha .223 lee collet sizer, and he reckoned that it was something to do with ramming the press into the collet die with no cartridge causing the collet fingers onto the mandrel...
http://www.predatormastersforums.com/fo ... Post259163

Not sure this applies here... but similar looking photos of the issue.
That is interesting, I'll have a look at my die but as the problem was intermittent I suspect it isn't the answer. Will report back.
if the piece that squashes the collet together, has not released from the collet when you drew out the previous case, then it would do just that, then when the tension is released back off as you withdraw, it could then pop free, or if you then inspected it, maybe it released then?
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Re: Preparing .303 Brass

#15 Post by mag41uk »

The collet dies really need to be cleaned up and deburred etc.
Polish the de-capping rod and use a bit of copper slip or moly grease on the collet taper.
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Re: Preparing .303 Brass

#16 Post by pe4king »

mag41uk wrote:The collet dies really need to be cleaned up and deburred etc.
Polish the de-capping rod and use a bit of copper slip or moly grease on the collet taper.
+1 on this, strip the die, give it a good degrease, clean even a bit of scotchbrite will do, lube it and crack on better than new, the dies do pick up crud from the cases over time.
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Re: Preparing .303 Brass

#17 Post by Alpha1 »

Throw it in the bin and buy a decent neck die.
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