Thickness

[HEAD0001]

I have been looking at buying some gas checks for a 22 caliber 22 Hornet bullet. And also a 30 caliber 180 grain bullet for my 30-06.

I have been seeing different gas checks, and different thicknesses. Normally in the past I just bought the Hornady and used them. However with the massive price increases in GC's I have been looking at a few other GC's.

It seems most brass style Hornady GC's are .012"?? I s that correct??

I saw some .009" aluminum GC's. Will these be as good and as effective as the Hornady brass GC's?? I would think that differences in thickness would make a difference?? Does it?? How about differences in GC material?? Thanks, Tom.

[JeffinNZ]

Hornady .30cal checks are made from 17 thou gilding metal. .22 checks are 10 thou.

For home made I like 8-10 thou for .22 and 12-14 thou for .30cal. 16 thou for .30 Brit.

[Von Gruff]

GC thickness required also depends on boolit shank dia and sizing dia to suit particular barrel. Alloy composition of boolit can also have an effect.

Von Gruff.

[HARRYMPOPE]

I agree with Jeff on home made 30 cal thickness.I use .014 from .309 to .314 dia,but much over .314 they are too small.I am lucky enough not to own a .303 so i dont need 8mm gas checks(kidding Jeff,i see how well you have gotten yours to shoot especially your Pygmy)

A GC shank of about .285 is average for most 30's.

HMP

[Sagebrush7]

Hornady .30cal checks are made from 17 thou gilding metal. .22 checks are 10 thou.

For home made I like 8-10 thou for .22 and 12-14 thou for .30cal. 16 thou for .30 Brit.

Jeff, Are you using .016 in the .303 with Charlie's tool? Bullets have a .284 shank? Thanks James

[JeffinNZ]

Jeff, Are you using .016 in the .303 with Charlie's tool? Bullets have a .284 shank? Thanks James

James, for my .303 Brit checks I have to use a 2 ply system to get 16 thou. 12 litho plate outer and a 4 thou soda can wall inner. Works great but single ply would be better. I have found that alum. aerosol cans are 16 thou in the side wall so I grab all I can now.

Shanks are .284 for Lyman however my CBE .303 bullet shanks can be .290 as Jim cuts them bigger for the stout military grooves.