Got a handful of Sierra 69gn TMKs off a mate to try in my AR. With three different Lee seating dies I cannot get the OAL below 2.260. 2.264 is the closest. The seating stem is wound all the way down and winding the die body further into the press will begin to crush the case.
I’m surprised at this having loaded 10s of thousands of rounds of .223 over the last few decades, with bullets ranging from 45 to 90 grains in Lee dies. Given that the Lee seating stem is cone shaped internally to protect the bullet tip, the ogive of the TMK must be such that it is “too slim”....
Thankfully P Mags will take the slightly longer cartridge, but DPMS marked mags won’t.
Tipped Matchkings and Lee dies
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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.
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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.
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.
Tipped Matchkings and Lee dies
In 1978 I was told by my grand dad that the secret to rifle accuracy is, a quality bullet, fired down a quality barrel..... How has that changed?
Guns dont kill people. Dads with pretty Daughters do...!
Guns dont kill people. Dads with pretty Daughters do...!
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TomH
Re: Tipped Matchkings and Lee dies
Easiest thing to do would be to put a washer behind the seating stem to gain more downwards adjustment.
Re: Tipped Matchkings and Lee dies
Or reverse the seating stem.
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Furiouspilgrim
Re: Tipped Matchkings and Lee dies
Flat part pushing on the TMK isn’t pretty.Alpha1 wrote:Or reverse the seating stem.
Long term solution is make a new seating stem or pack it out.
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meles meles
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Re: Tipped Matchkings and Lee dies
Do you have a hammer ?
Badger
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"Quelle style, so British"
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dromia
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Re: Tipped Matchkings and Lee dies
Seat with a Lee loader.
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