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Another cast boolit seating question
Posted: Fri Apr 03, 2015 1:19 pm
by Dougan
Is it OK to seat a cast boolit (.303 in this case) to the point where the gas-check is just inside the case (i.e. past the neck and just slightly into the shoulder area), or will the heat melt the lead in front of it and/or pop it off as it shoots forward back through the neck...?
Re: Another cast boolit seating question
Posted: Fri Apr 03, 2015 1:21 pm
by dromia
It should be just fine, if it wasn't then no one would be shooting plain based boolits.
The gas check will need to be seated through a sizing die though.
The only issue with increased seating depth is the same as for jacketed, reduced case capacity and the implications of that.
Re: Another cast boolit seating question
Posted: Fri Apr 03, 2015 1:38 pm
by Dougan
Thanks for the advice as always Adam
I think one of the problems I had last year was that the load was too fast (velocity wise that is), so was planning to drop the powder load anyway; but will allow also for the reduced case volume (though only going about 50 thou deeper anyway)...
...I've also picked up a 8mm seating die, so the boolits will be seating straighter.
Right, off to do some sizing and spudding
Re: Another cast boolit seating question
Posted: Fri Apr 03, 2015 2:13 pm
by bewildered
On a vaguely related subject I shoot cast, gas checked bullets in my 308 and the bottom of the bullet is well past the case shoulder. I use 16g of Alliant 2400 behind a 190 grain bullet. This goes at about 1550 fps and is the dogs danglies at 200 and 300 yards. No leading in barrel.
Re: Another cast boolit seating question
Posted: Fri Apr 03, 2015 2:31 pm
by dromia
Mattern and Harris, how we could do with knowledge like they had/have available to our "national" bodies.
Re: Another cast boolit seating question
Posted: Fri Apr 03, 2015 5:17 pm
by Dougan
bewildered wrote:On a vaguely related subject I shoot cast, gas checked bullets in my 308 and the bottom of the bullet is well past the case shoulder. I use 16g of Alliant 2400 behind a 190 grain bullet. This goes at about 1550 fps and is the dogs danglies at 200 and 300 yards. No leading in barrel.
That's totally 'related' - It's good to know that others don't have a problem with the GCs in the case...and also interesting that you're getting good accuracy at 200/300 with a velocity less than 1600 fps...makes me more confident that I should be working down rather than up from my current (and not brilliant) load...thanks for your comment
