Setting dies for BTO.

**charlie b** · 11-18-2023, 05:31 PM

I do the same but with a fired case and bullet. Size the case mouth just enough to hold the bullet. Chamber, extract, measure, done.

**NF1E** · 11-18-2023, 08:46 PM

Lots of ways to skin the cat. Whatta Hobby!

**Robinhood** · 11-18-2023, 10:57 PM

Yes there are. Have you compared your fired case to your Hornady modified case. I found the base to shoulder dimensions to be as much as .010" different. Might be worth looking into if you are wanting to be precise.

**NF1E** · 11-19-2023, 06:43 AM

Originally Posted by Robinhood

Yes there are. Have you compared your fired case to your Hornady modified case. I found the base to shoulder dimensions to be as much as .010" different. Might be worth looking into if you are wanting to be precise.

Sure have. Hornady provided cases that I use in 6.5, .308 and .223 are right on the money for SAMMI chamber dimensions as are my rifles. Years ago when I first started using this tool I did comparisons with the old way of making a snug bullet fit on a case and chamber it to set the bullet in to reach BTO. Thanks for bringing that up though. Awareness is half the battle for sure. I find a Sheridan cartridge gauge an invaluable asset on the bench.

**Dave Hoback** · 12-02-2023, 12:47 PM

I made one of those tools myself and use a casing that was previously a round shot & formed to my chamber.

**Robinhood** · 12-02-2023, 11:45 PM

That is how I did/do mine Dave. It works for me.

**NF1E** · 12-03-2023, 07:33 AM

I would have fire formed a case too, but the case that came from Hornady is a perfect replication of the chambers on the two Savage rifles I am shooting precision with. Both an older model 12 FVSS and the 30 year old model 10 in .223. I keep a Sheridan open sided gauge on the bench for checking all the time. Whatta Hobby!