7mm-08 case crunching $$

[357maximum]

them $$ should have been ?? in the title ooooooopsidaisy



What if a fella had a chepskate father in law that he kinda likes, and that FIL needs some brass for his model 700 in 7mm-08, and that really nice son-in-law has a pretty good stash of 243 and 308 brass? Is there any pitfalls other than the normal caseforming "issues" to look out for?

I would really rather use the .243 brass .....I will have the rifle to play with by the weekend and would like to try/fit both crunched cases then.....what say you any heads up particulars to look for? I have made other crunched case before, just looking for particulars and no I have not really done any research, but a quick search on this particular scenario here turned up nothing....almost all of my experience in the past was making a .30 hole into a .35 hole....is it basically the same when you go the udder deerection?

thanks
Michael

[Bass Ackward]

....almost all of my experience in the past was making a .30 hole into a .35 hole....is it basically the same when you go the udder deerection?


Brass tends to flow the other direction. Just never say, "always".

[45 2.1]

Easiest way is to fireform the 243 up. Depending on which 308 brass you have, you may or may not need to neck turn the brass when necked down.

[Trailblazer]

I use 308 brass in my 7-08. I have necked down R-P and LC with no problems whatsoever. I found that the necks need to be turned on Federal brass so I don't use it since I have plenty of R-P. 308 brass does come out a little short. If you really want full length cases use the 243.

[357maximum]

Thanks Guys


I started playing with my personal model 7 in 7-08 and found that neck turning will be necessary if I were to use fed or lc brass. I have some brand new rem 308 brass that will not need turned necks in my gun...but that is in my rifle.....his will likely be similar...but nothing will be done til I get his rifle, just cause they both say rem on them...means nothing til I can prove it. The .243 rem brass will work without turning also, and it comes out a bit longer on the 2 rounds I tried. I am working with my rcbs dies, but I have a set of lymans on the way...I have seen that make a difference in the past also....not only that I will not have to re-adjust dies for each toy as he prefers lighter FLGC bullets than I do. I like the 140's he likes more hydrostatic varmint bullet behavior of the 120's .....to each their own I guess.

I also had to use a 308 small base die on the LC brass otherwise it was toooooo tight in the web...just a heads up for those following along.....mil brass was shot in god knows what...but an m-60 was the likely tool involved....I think I will stick with the .243 brass if his is similar to mine......no-one at his deer camp shoots 243 so that would be best for all I guess......some of his old ironworker buddies are a bit hamfisted, but most shoot 270 or 06 thankfully....according to his buds his 7mm-08 can barely kill......but ....but it is them who need two shots from time to time....not him...funny huh?

thanks again
Michael

[GrizzLeeBear]

Don't have a 7mm-08 but I made lots of 7TCU brass by necking up .223 cases. Lot bigger jump than .243 to 7mm. I'd use the .243 brass so you wouldn't have to worry about necks getting too thick.

[selmerfan]

.243 brass works fine, make sure you grease your expander ball with a little Imperial lube every few cases.
Selmerfan

[357maximum]

thanks fellas...my .243 stash is gonna get smaller.

[leftiye]

I got some you can have. You pay the postage. P.M. me.

[357maximum]

pm sent

[Southern Son]

357 Maximum,
What do you mean cheapskate. I sold a 300winmag but was left with a whole bunch of brass. I could not find another use for it, so I necked it up to 458WinMag, lost a few with split necks, but that could have been avoided if I had annealed the necks. Had a hell of a lot of trimming, to. Like GrizLeeBear I have made a heap of 7mmTCU from .223, I found the best way to do that was to do it in two steps, first to .265, then to .284, I know that .265 is not midway between .224 and .284, but at the time all I had was a .270 expander that I had polished down a few thou. If you have fired the .243 brass a few time, you might consider annealing to avoid the split necks. Once the neck splits, they are scrap.

[Silicon Wolverine]

308 to 7mm-08 is a better change than 243. pick up some once fired 308 military and change er' over. i did bunches with mine beore i got rid of it.

SW

[357maximum]

308 to 7mm-08 is a better change than 243. pick up some once fired 308 military and change er' over. i did bunches with mine beore i got rid of it.

SW

HA

I am good for the rest of my life in the mil 308 arena.......I am all set guys but thanks for the offers.....both cases seem to work fine....I even crunched some for my rifle.....


As far as my FIL being cheap...not too bad really...I am just trying to get him to shoot more often

[dakotashooter2]

I have sized down several hundred surplus mil brass to 243 without any problems. I have not had to turn the necks for either gun I use them in. I suspect that may be in part due to the necks being shorter. I have actually found the formed brass to have a bit of an accuracy edge over my commercial brass dispite (or maybe because of ) the shorter necks. The other thing I like is no caliber headstamp.