Shortening cases

[DC]

I have a around 100 45-90 cases that I want to shorten to 45-70 2.10". I will need to trim .3 inches.  My question is, what is the best way to do it without buying  a bunch of things I will use only once?  I have a trimmer.

thanks for your help and advice!

[quickdtoo]

I've not tried it, but I've cut a lot of brass and copper with a tubing cutter, should work fine. But if it were me, I'd sell or trade them in the classifieds here. 

Tim

http://www.acehardware.com/product/index.jsp?productId=1288854&cp=2568452.2631238.1260857&parentPage=family

[stimpylu32]

I agree with Tim as far as trading goes , if you do decide to trim them down its not to bad a job with the right trimmed , also a small hobby saw does a good job of removing the excass and then just true up the end with a trimmer .

I use a Forester with the power addapter and a cordless drill . works wonders for removing  up to 1/2" of case , never tried anymore than that .

stimpy

[quickdtoo]

On second thought, the tubing cutter may not work well due to the slight taper of the case, forgot about that. 

Tim

[skb2706]

May not be something you'd benefit from but for larger quantities. I bought a "mini chop saw" from Tool King. Made a jig that lets the excess brass protude thru the end and tightened it up in the little vise thing. I can chop 100 cases in just a few minutes. I cut them about .005" long and turn the rest off on my case trimmer.
chop saw was $24

[Hairtrigger]

I have used my RCBS trimmer to take almost a 1/2" off large cases to make home made powder and shot dippers. It worked fine... just took a bit of cranking

[quickdtoo]

The hobby or chop saw looks like a good way to go, and a good excuse to buy another power tool..... More Power!!

Tim

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=42307

[PA-Joe]

It's cheaper and better to sell that brass and get some once fired 45-70. You may even make money on the deal!

[AtlLaw]

It's cheaper and better to sell that brass and get some once fired 45-70. You may even make money on the deal!

+1  It don't make much sense to modify something expensive to make something cheap!  Modify something cheap to make something expensive or unavailable, or one to another of things of equal value (like the 260's I just formed from 243's).  But it seems to me 45/90 brass is appreciably more costly then 45/70.