trimming rifle brass

[ssgrock3]

example of 45/70. Do you have to trim everytime it is fired? I have loaded pistol ammo for Many years, but this will be my first rifle try out.

 

[_CY_]

look up spec's on min and max length... then measure with a pair of calipers.

 

[ssgrock3]

yeah, 10-4 I got that. I use a manual for specs and loads, no matter what. Just wondering what i can expect for loading rifle bullets. Do they stretch out every time or what?

 

[12gabackup]

Don't know about the 45-70 but, most rifle calibers that I've reloaded need trimming about every third sizing.

 

[ssgrock3]

ok, thanks. reckon my manuals and all the google searches would have given that info up eventually but just curious and am trying to learn it before I take on the task of loading up these big ole bullets. Now to learn how to trim and deburr. looks fairly simple, especially since it is not for a semi auto that will require doing a bunch of it.

 

[12gabackup]

Just follow the manuals closely and ask questions.
Don't get too overly zealous with the deburring.

 

[HiredHand]

I believe straight walled cases don't strech as quickly as bottle necked cases. If you have to trim just trim to the minimum spec and check a few cases after each firing.

 

[oneof79]

Some straight walled pistol brass gets "shorter" when you re-size it. I don't know for sure about 45/70, it is a straight walled case. Is there an expander ball in the resizing die?

 

[1mathom1]

I believe straight walled cases don't strech as quickly as bottle necked cases. If you have to trim just trim to the minimum spec and check a few cases after each firing.

+1 on that.

 

[GUN DOG]

trim to min one time & are probable good for 5+ loading at trap door pressures, ruger & lever loadings may be 3. Depends on how hard you push that 4570. Mesure after you shoot & resize if they fall into the good to go lenth load them up