10 gauge slug load data

[6pt-sika]

I’ve got a device that is in reality an inside caliper that will go six inches down in the barrel . Seems to me nominal bore diameter on most of my Parker 10’s has been about .780” . However most are choked down 30 to 35 thousandths . So I can’t use BB’s larger 10 gauge mold as I’m sure it wouldn’t take many shots to work on the barrels . I can however take his .730” mold and use a .010” Mylar wrap and get pretty decent results .

[6pt-sika]

That was a nice remembrance page, unfortunately there was insufficient information to identifly the article publication source and date

I have long been a fan of Don Zutz.

I’m pretty sure that article was in Gun World . If you notice in the first high lighted section there’s an address and it says “Dept.GW” that was typically what all the gun mags did back the. In an instance like this so hopefully the person receiving the mail would know the inquiry came because of something in a particular magazine . Now as to which Gun World magazine it was in I dunno .

[W.R.Buchanan]

The is such a thing in the Shotgun World known as a Bore Gage. It has a probe that has ball bearings that work against a wedge/cone with a Dial Indicator outside that pushes the balls outward.

You set the probe to a known diameter using a Ring Gage and then the bore is measured plus or minus that set dia.

Many serious Trap Shooters have and use these instruments and a good friend of mine makes one of the best.

There are several guys over at Trapshooters.com who make and sell them.

There are also several versions of the Bore Dia Chart below. and they are all slightly different. but usually +/- .005 on all the dimensions. IE: 10 ga runs .775-.780 12 ga. runs .729-.735 etc.

Randy

[6pt-sika]

The is such a thing in the Shotgun World known as a Bore Gage. It has a probe that has ball bearings that work against a wedge/cone with a Dial Indicator outside that pushes the balls outward.

You set the probe to a known diameter using a Ring Gage and then the bore is measured plus or minus that set dia.

Many serious Trap Shooters have and use these instruments and a good friend of mine makes one of the best.

There are several guys over at Trapshooters.com who make and sell them.

There are also several versions of the Bore Dia Chart below. and they are all slightly different. but usually +/- .005 on all the dimensions. IE: 10 ga runs .775-.780 12 ga. runs .729-.735 etc.

Randy

I have two shotgun friends that have those and I’ve borrowed them a time or two . The thing I have is a bore gauge as well , however the way this one was made I prefer to think of it as inside calipers . I think the type you have pictured does a better job then the thing I’ve got . But since mine was given to me I can’t complain .