Gas Checked bullets, Load same as lead?

Rule3 · Oct 11, 2011

I picked up a box of gas checked 113 gr cast bullets for this 327 Fed Mag I am playing with.

Having never used gas checks, can these be loaded more towards FMJ data or just regular lead.?

With today's alloys I really do not see a purpose for these gas checks other than trying to prevent leading. Does the bullet base still expand (obturate)?

Snapping Twig · Oct 11, 2011

Gas checks allow higher velocity and help overcome leading when bullet fit is not correct.

I load my checked bullets at jacketed spec., always have.

Example: 265g GCSWC over 22g W296 in a 44 mag.

You can shoot them slow too, in fact, you can shoot a GC bullet w/o the check if you like - I do it all the time in the 38Spl and the 45-70. No leading and total accuracy.

Experiment a bit, you'll get good results.

edited to add:

Elmer Keith had little use for gas checks and claimed that they did not obdurate properly, others disagree and who am I to say one way or the other?

I believe they function as advertised, and recovered bullets appear to back me up, but I'm no scientist.

lebomm · Oct 11, 2011

I've always used GC bullets for my hotter loads w/cast. Never saw much diff in handguns, but the Lyman 358156 performs like a jacketed in my .357 Rossi carbine and my rebored Martini Cadet. In a chambered barrel, as opposed to a bbl/cyl, they absolutely WILL obturate properly, and will take soda cans time after time @ 100 yds from either rifle.
For cast bullet rifle, I use them for all loads above about 1500 fps, getting leading only in older rifles with iffy bores.
But that's just me.

Larry

jbull380 · Oct 11, 2011

If you can find a Lyman manual it should list GS bullet loading data. My manual is older than the .327 so it doesn't list loads for it.

mtgianni · Oct 12, 2011

You should be able to work up to jacketed loads with a properly fitted gas checked lead bullet of the proper hardness .

Gas Checked bullets, Load same as lead?

Rule3

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Snapping Twig

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mtgianni

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