cast boolit velocities,,,, 'how come?'

Boolit Mold Join DateDec 2012Posts15

a recent post I read elsewhere caused me to stop and check my loading for my .45acp. I did it right, it was under the max for the time the Speer #8 manual was printed. But, I noticed something else.... That manual lists a jacketed 200gr boolit with 7.7grs of Unique for 1000fps velocity, and also a 200gr cast semi-wadcutter with 6.0 grains of Unique for 840fps velocity. How come? Wouldn't the lead hold up just as well at 1000fps as it would at 830? I mean, the rifle rounds run much faster without lead stripping. What is it that I don't understand?

IIRC, the Speer manual is the one with the notation under the lead loads "The loads listed are not necesarilly maximum loads, but are velocities most often used for target shooting" or somesuch.......

Dan

Boolit Mold Join DateDec 2012Posts15

IIRC, the Speer manual is the one with the notation under the lead loads "The loads listed are not necesarilly maximum loads, but are velocities most often used for target shooting" or somesuch.......

Dan

I never noticed that. Print must have been small. I used the jacketed load data, buy not the max, and never had any trouble with lead stripping, so, I was curious. Glad it was a simple thing. However, this does raise another question. My newer Speer manuals have a lower max charge of 7.4grs Unique, whereas the older manual listed 7.7grs max. Did the powder change, or did Speer become more conservative in their estimates?

I never noticed that. Print must have been small. I used the jacketed load data, buy not the max, and never had any trouble with lead stripping, so, I was curious. Glad it was a simple thing. However, this does raise another question. My newer Speer manuals have a lower max charge of 7.4grs Unique, whereas the older manual listed 7.7grs max. Did the powder change, or did Speer become more conservative in their estimates?I think it was fear of litigation. In some cases more testing from multiple fire arms can show better performance than a universal reciver but for the most part it prolly had to do with lawyers more than anything.

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because i doubt there using hand casted bullets. probably swadged commercial bullets made out of pure or near pure lead.

Most if not all of the manuals have lowered there max loads. Partly more conservative but mostly electronic measurements in place of crusher measurements.

Carl

Wasn't it Speer #8 that was somewhat notorious for having some rather "energetic" loads, too?

it was either 7 or 8.
if I sold bullets and was doing a reloading manual.
I would make dang sure my product was the one highlighted by the best accuracy potential and highest velocity.
it wouldn't hurt if the profit margin on those same bullets were the highest either.

it's all an educated guess,,,, till the trigger is pulled.

the more i find out about shootin boolits, the more it contradicts everything i ever learned about shooting jaxketed.

Most if not all of the manuals have lowered there max loads. Partly more conservative but mostly electronic measurements in place of crusher measurements.

Carl

Today's better testing equipment and a switch from CUP to PSI tend to show slightly lighter loads...

Boolit Master Join DateMar 2005LocationWashington StatePosts198

Jacketed bullets offer more resistance than cast, so a max load for jacketed should be entirely safe with cast. There must be another reason for the lower max. Could be old data (jacketed) vs. new (cast), then the better measuring equip. could account for the difference, maybe.

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Abbreviations used in Reloading
Pointed Soft Point "Core Lokt"

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