Gas check with a hole in the middle ?

[Johnch]

I was looking a some stuff the other day at the gun show
A guy that had lots of old , well used reloading stuff had 50 or so "gas checks " in a plactic bag
But they had a hole in the middle

They looked to be 44 or 45 cal with a 30 cal hole in the middle

I was wondering if they were to put in as a scraper in the middle or top of the bullet
With the hole to allow the lead to flow thru and fill out the nose

If that was the use , it would take fast fingers to put them in the mould

But at $5 for the bag , it was to much to play with them

Only found 1 mould that I wanted , that followed me home a .490 RB mould
For $5 , I could not resist

John

[45nut]

Those were "Wilk" GC's, the idea of the hole in the center was to give the option of placing them either in a driving band or on the base. It was in the Handloaders Bullet Making Annual Vol1 circa 1990. The Author, Dave Scovill used tweezers to place them in the molds before closing them.
The results were vague and inconclusive to my eye.

[scb]

Then there are these.
http://www.corbins.com/lead.htm#bgs

[Morgan Astorbilt]

Sounds sort of like the old Harvey Prot-X bullets that were cast with a zinc base washer, and used with no lube. Prot-X bullets were the bane of casters who mined their ranges for lead, causing zinc contamination. This appeared as wrinkled bullets that no amount of temperature raising would eliminate, causing the necessity of tossing the whole batch of lead.
Morgan