Just had to say that I bought a Forster case trimmer for trimming a box or two of 470NE cases, and it could not have gone easier.

I have for decades used a micrometer trimmer for all the other guns I have, but needed something that would work on these really long cases. So... bought a trim file die, and it works OK. When the Forster arrived, though, things got easier, more uniform, and really fast. I'm confident that I'm within 2 thousandths on all of these, and since I am crimping them just a bit, that uniformity is kind of appreciated !

Sharing for those that have double rifles and get to contend with the "very particular" nature of those interesting guns.

quote:

Forster case trimmer

I have two Forster's. I bought the Large one last year to Trim 500 Nitro. The Pilot wouldn't fit in the case. I called Forster and they said ship the Pilot in and a case. About 3 weeks later they called and wanted me to pay for it? I started laughing. After they called their shop they got back to me and shipped it back for free.

I use the Foresters, have for years, but for any double I use a file trim as they are simply more accurate, contrary to your statement as I understand it..I use the file trim die, taper crimp die, so as to be exact for for a tight dcrimp into the cannalure.

I also trim the Expander ball down one or two thousands, maybe three thousands, for tight fit of bullet, or you can purchase a smaller expander ball if you wish, and I use a powder such as IMR-4831 that fills the case half way up into the neck to get just a little compaction and that keeps the bullet from setting back in the case...Why do I do this?

The worse thing that can happed in a Dangerous game charge is for a bullet to stick in the barrels and you dump all the powder in the action and chamber and have a stuck bullet in the throat..Most important is for the case to hold the bullet until a primer strike.

I'm probably not as refined in using the file trim die, but I got the most uniform case length results by sizing the brass, then putting it in the Forster. Aiming to get a uniform crimp / uniform pressures, as do you.

The case trimmer just worked better for me, probably because it is in essence a small lathe. My two cents, anyway.

I know a guy that had exactly that dire scenario happen. 577 nitro. Buffalo was shot and ran off. Reloaded right barrel. Saw him through the brush. Shot again. Reloaded right barrel. Repeat one more time.

Buff charged and right barrel was fired again. However, Left barrel wouldn't now fire because recoil of the four shots in right barrel had dislodged the bullet in the left barrel. Eeek!

PH saved the day and then said from now on, please kindly ROTATE YOUR RELOADS!!!

Thank you for sharing your experiences, both with the hunting, and the trimming. I have used the file method to convert cases many times in the past. I used a hacksaw, or a fairly rough cut file for the first pass, and then make the last pass with a finer, second cut file. Having said that, I find the Forster trimmer to work quite well, at least since 1983.

Good luck with your double rifle.

I use a lee Crimp Die in all my strait wall cases.