Lyman 575213PH weights.

[Maillemaker]

So I got my Lyman 575213PH mold in and have cast up nearly 100 bullets with it. My weights using pure lead are averaging 525.61 grains. This is quite a bit lighter than the stated 566 grains.

I'm going to use this for my Pedersoli P58 to see if I have as much luck as Space Cowboy.

Here is my data:

522.7
522.7
523
523.5
523.7
523.7
523.8
523.9
524
524.1
524.1
524.2
524.3
524.4
524.4
524.4
524.4
524.6
524.6
524.7
524.7
524.7
524.8
524.8
524.8
524.8
524.8
524.9
524.9
525
525
525.1
525.2
525.2
525.2
525.2
525.3
525.3
525.3
525.3
525.4
525.4
525.5
525.5
525.6
525.6
525.7
525.7
525.7
525.7
525.7
525.7
525.7
525.8
525.8
525.9
525.9
525.9
525.9
525.9
526
526
526.1
526.1
526.2
526.2
526.2
526.2
526.3
526.3
526.3
526.3
526.4
526.4
526.4
526.4
526.4
526.5
526.5
526.5
526.6
526.8
526.9
526.9
527
527
527
527
527.1
527.1
527.1
527.3
527.6
527.6
527.7
527.9
528
528

[tmont]

Interesting! My shooting buddy just received a 575213OS which is advertised to cast a 460 grain bullet. Instead it casts a bullet weighing around 529 grains. I have a Lyman wadcutter mould which casts a bullet running in the neighborhood of 360 grains when it is advertised to cast 315 grains.
Are Lyman moulds usually that far off?

[Smosin]

I have a Lyman minie mould I got in a trade quite a while ago, but have never used. I don't know exactly what wt it is, or actual cast diameter. Old style? New?
It is marked "575213AZ". Anyone know what the "AZ" might indicate, if anything?

[Rebel Dave]

A Z is something to do with the manufacturing of the mold. You have a standard Lyman Minnie mold.

Rebel Dave

[Smosin]

A Z is something to do with the manufacturing of the mold. You have a standard Lyman Minnie mold.

Rebel Dave

Thanks for that info!

[Ron/The Old Reb]

The letters tell Lyman which cherry was used and the vintage of the cherry.

[Hickok]

Maillemaker, my Lyman PH mold is about 10 years old. I just cast some mines today and they are averaging 561 grains, and run .577-.5775" for this batch.

[Maillemaker]

Hmm. This is the scale I am using to measure them:

http://www.midwayusa.com/product/713...grain-capacity

Steve

[Scott Kurki, 12475]

By analyzing the data provided, it appears that the mold will eventually cast the advertised weight.

[Hickok]

Maillemaker, I have the same brand scale as you, but a different model;http://compare.ebay.com/like/3708435...Types&var=sbar

Sure is a large variation in your mold and mine.

Even if your lead had an alloy in it, I wouldn't think it would account for such a light weight. I wonder if Lyman may have changed the depth of the base cavity? My base cavity is .216" deep. If yours is deeper, maybe we have an answer.