Lube Dizer Die Too Small?

[Old Ranger]

I've had a Lyman 245497 mold and 243 Lubesizer die for years and never used them. Cast up a bunch of bullets for a friend to try in his 243. Bullets dropped from mold at .246 which was fine. After running them through the Lyman sizer die they all mike 241.5- 242. Have not tried shooting them yet. Will he have a leading/accuracy problem?

Can the sizer die be open up to 243+ easily and will it then leak lube?

Alloy was WW + 3% Tin water quenched from the mold. Any advice/feedback is appreciated.

[Wayne Smith]

Unless he has a very tight 243 they will lead. I would re-melt those and either pan or dip lube them until you get a new sizer. I can't tell you how much you can open one before you get lube squeeze by, and that in part depends on the lube. I'd be looking for a measurable slug from his barrel and a sizer die .002 larger than that. Measured with a micrometer, not a caliper.

[dragonrider]

Remelt as mentioned above and try them as cast after pan or tumble lubing, if they chamber ok they should shoot ok. As with any new load reduce your charge by 10 to 15 % and work up. Lyman lube dies have a very limited amount of wiggle room when it comes to opening them up. Over .0005"-.001" will usually cause leaking past the inner punch.

[MtGun44]

How are they measured? IF with a caliper, don't do anything until you get a
decent .0001" reading micrometer. Lots available on eBay and ENCO Tools online
has Fowler brand, usually on sale for $25-35 range, and it is a good mic.

Calipers are +/- .001 so not really up to measuring boolits.

Bill

[dkf]

I have the opposite problem. I bought a Lee .357 sizer and it sizes my boolits to .3574" at the base to .3578" at the other end above the lube groove. Looks like I have to buy a .356".

[geargnasher]

+1 Dragonrider. The bigger, the better as long as they can squeeze through the throat without shaving lead and the loaded neck diameter isn't too large. Might need a bigger expander spud, too, or just use a neck-sizing die to prevent excessive neck tension and overworked necks.

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