45/70 info

Unless your shooting a single shot in my experience you need a crimp to do one of two things...1. hold bullet from slipping back into the case under recoil or 2. to keep the compressed load from pushing bullet out of the case :rolleyes:
 
I taper crimp all my competition reloads but only enough to iron the flare of the case mouth out.

My hunting loads are taper crimped too for the same reason.

I've had no case life issues and I can't even remember how many reloads my competition brass has had.
 
With my 1895 I don't crimp while shooting off the bench as I shoot one round at a time.

I crimp my bullets using Lee brimping die for all hunting applications.

Danny
 
Originally posted by 280 Ackley:

I owned a Marlin Stainless 45-70 Guide Gun, but I just can't warm up to bullets travelling under 2200fps with the BC of a AA Duracell and trajectory of a downrigger ball thrown by a 6yr old midget with poor hand/eye coordination.
 
Re: .45-70 info - crimping

Use in a tube magazine or where powder charges are compressed crimping, is virtually a must. Some loads, ie: non compressed charges, in a single shot, crimping doesn't provide much of a benefit.:)
 
I shoot a tube mag 1886 Winchester, therefore I crimp. Does it make a difference in case life? Probably, but if you shoot heavy loads, it won't matter a whit, because the loads themselves will dictate case life.
On regular loads, case life on a well costructed 45-70 can be very long, even with a crimp. I'm getting 25 loads at least.
You will get failures from crumpled brass in the press occassionally, that's probably where your most serious case issues will be. Particularly with cast bullets, if you don't own an expander like Lyman's excellent M die.
For consistent crimps, the Lee factory crimp hasn't been beaten IMO.
 
I crimp for the opposite reason..I shoot compressed loads and 500 gr bullets, I want everything to stay in place
 
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