Another cast boolit seating question

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Dougan · #1 Post by **Dougan** » Fri Apr 03, 2015 1:19 pm

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...?

#2 Post by **dromia** » Fri Apr 03, 2015 1:21 pm

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.

Dougan · #3 Post by **Dougan** » Fri Apr 03, 2015 1:38 pm

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

#4 Post by **bewildered** » Fri Apr 03, 2015 2:13 pm

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.

#5 Post by **dromia** » Fri Apr 03, 2015 2:31 pm

Mattern and Harris, how we could do with knowledge like they had/have available to our "national" bodies.

Dougan · #6 Post by **Dougan** » Fri Apr 03, 2015 5:17 pm

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

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Another cast boolit seating question

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