I picked up some of these just the other day for my H&R pardner 20GA. One of the slugs was sacraficed in the name of science. A lot of people seem to think that slugs in general are under sized. Years ago this used to be the case, anymore though they are full bore diameter. Once I got the slug out of the hull I pulled out the calipers. The slug measured .614, while this is not the full bore of .615 for the 20GA the slug lodged just forward of the Pardners chamber when I did a drop test. So much for todays slugs being undersized Next the slug was weighed, Rem claims 5/8 OZ which converts to 273gr. The RCBS scale said otherwise, the slug came in at 293gr.
Now the thing that perplexes me is these slugs are packed full of Grex buffering behind the slug This is the only slug that I've encountered that uses buffer material. Can anyone speculate as to why they would use buffer and no one else does? Finally I also cut open a Federal Truball slug, it mic'd right at .729 and came in at a full ounce (437.5gr). So there you have it two slugs (of recent production) in the most popular gauges and not one was undersized. As I stated in another post all of the ammo companies fixed the issue of under sized slugs some years ago. The issue of under sized slugs is a thing of the past.
Now the thing that perplexes me is these slugs are packed full of Grex buffering behind the slug This is the only slug that I've encountered that uses buffer material. Can anyone speculate as to why they would use buffer and no one else does? Finally I also cut open a Federal Truball slug, it mic'd right at .729 and came in at a full ounce (437.5gr). So there you have it two slugs (of recent production) in the most popular gauges and not one was undersized. As I stated in another post all of the ammo companies fixed the issue of under sized slugs some years ago. The issue of under sized slugs is a thing of the past.