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Old June 5, 2012, 09:51 AM   #1
Marduk
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Gas Checks and powder

I am planning on casting some 170 FN for my 30-30 and and the Lee manual has reloading data for a 170 Lead Bullet. Question is, does adding a gas check to the bullet affect this data in any way?

I assume it is still a 'lead bullet'? (ass-u-me ???)
Do I stick with the 170 or do I need to weigh the bullet with the gas check on and do some fancy ciphering?

As always, thanks!
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Old June 5, 2012, 10:17 AM   #2
Rangefinder
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Nothing changes---load it on the 170gr data.
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Old June 5, 2012, 09:26 PM   #3
454PB
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I read somewhere that HP White laboratory did some pressure testing many years ago on .44 magnum ammo and found that gas checks do increase pressure. You should be building a load from below, so it shouldn't be a problem.
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Old June 5, 2012, 11:08 PM   #4
Marduk
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Thanks guys!
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Old June 5, 2012, 11:18 PM   #5
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It is pretty standard to load the same as a plain base bullet.
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