fun with fire forming

[Crunchy]

What kind of dies you using?  I have a cheapo 2 die set from RCBS that I am not in love with.  Almost impossible to fine tune bullet seating.  Need to step up my dies just not sure what to go with. 

[jasnt]

Rcbs fl die set for 338rcm and 375 ruger.   What cartridge you shooting?

[yorketransport]

I like Hornady dies whenever I can get them. They sell their micrometer adapter that you can screw onto any of their seating dies which can be a big improvement.

If you’re willing to spend a little more, CH4D makes great dies and has a lot of less common and wildcat dies on hand. The last sets I got from them were about $90 each for the 6.5 Badger and 375 BME.

[Crunchy]

Rcbs fl die set for 338rcm and 375 ruger.   What cartridge you shooting?

7mm Rem mag

[Crunchy]

Whats you take on Redding Type S Match Bushing Full Die Set 7mm Rem Mag.  Not to derail this thread.  Promise last question lol.

[jasnt]

Whats you take on Redding Type S Match Bushing Full Die Set 7mm Rem Mag.  Not to derail this thread.  Promise last question lol.

i use one for my 243 and I like it

[fly-by]

Got 25 cases about ready to fire form

I am going through this same process with a different cartridge using 300 WM brass and get a similar "donut" of shoulder brass that is now part of the neck, similar to your picture.  Do you neck turn at some point?  If so is it best to neck turn before or after fire forming?

[jasnt]

I do not but I would after fire forming

[yorketransport]

Got 25 cases about ready to fire form

I am going through this same process with a different cartridge using 300 WM brass and get a similar "donut" of shoulder brass that is now part of the neck, similar to your picture.  Do you neck turn at some point?  If so is it best to neck turn before or after fire forming?

Turn the necks after forming and after running an expander through the necks. I’d you have an expander like a K&M or the Sinclair style that uses a mandrel instead of a ball it works the brass less.

The idea behind this is that’s running the expander through the neck pushes the donut to the outside of the neck so it can be turned off.

[jasnt]

Started fire forming today.  Using 66gr re22 and 225gr sst cci250.   No trimming required but I may need to trim soon haven’t measured max case length.     Formed case was 2.630. Fireformed case is 2.605.
Left to right
375 ruger, 8x68s fire formed, ready to fire form 8x68s

[jasnt]

Got all my brass formed and loaded.  I’m curious how these fire forming rounds will shoot. For fun I’m going to chrono them and test the accuracy.

[jasnt]

Got 25 cases fireformed. Velocity was 2630 average.  Accuracy was great. All 25 rounds made a 1” hole.

[yorketransport]

Nice! Did you lose any cases while forming them?

[jasnt]

Not one yet. 

[jasnt]

Got 55 case fire formed now. Still no culls. Hoping to start load development today