Changing Neck Size.

.308--win

.308--win

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BEFORE:Sop"s Arm, NL NOW:Southern Interior, BC
So I've been tring to get some new 243 brass, went to WSS and local gun stores, all were sold out! every other brass you could think of but on 243! Can't keep it on the shelf they said! One store told me to just get some 7-08 and run it through my 243 sizer, now I know this is ok, and that this question is probably older than time, but if I use 7-08 brass to make 243 do I need to turn the necks or just size and trim to length? These brass are for hunting only, if that means anything! Thanks for any info/tips!

Perry
 
You'll likely have to turn the outside and ream the inside then trim, chamfer in inside and deburr the outside. Mind you, any of those shops should be able to order whatever you want. Buy 100. Be prepared to pay up front though.
New brass will need sizing and trimming(you need to chamfer and deburr after every trimming.)
 
Size one down. Seat a bullet. Measure the neck diameter over the bullet with a micrometer. Compare it to the measurement of a factory .243 round.
 
tiriaq said:
Size one down. Seat a bullet. Measure the neck diameter over the bullet with a micrometer. Compare it to the measurement of a factory .243 round.
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Probably better to compare it to a factory .243 case fired in that rifle. There is usually about .001" springback so the neck of the chamber is about .001 larger than the fired case. It's good to have at least .003" expansion room minimum. A couple of my rifles are chambered for far less clearance but there is little advantage in crowding a hunting rifle. There are reasons for necking down cases but doing it to produce common cases isn't a great one.
 
If you can find 260 brass, It is a one pass & trim operation. I've never seen a 243 hunting rifle throat tight enough to require neck turning, even when sizing down commercial 308 brass. If using military brass, then it can be a problem. Regards, Eagleye.
 
Eagleye said:
If you can find 260 brass, It is a one pass & trim operation. I've never seen a 243 hunting rifle throat tight enough to require neck turning, even when sizing down commercial 308 brass. If using military brass, then it can be a problem. Regards, Eagleye.
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The .260 brass is probably harder to find than the .243...:D
 
.308--win said:
LOL!!!.......What I was thinking while I was typing it!!;) Is there a good way to mark them some how, just in case, or just make sure you do the right thing and keep them seperated?

Perry
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I've used felt markers like Sharpies to mark some of mine but over time it comes off. Putting them in their own boxes seems to work better and easy to keep together...

as an aside I've often wondered about loosing a case at a range that's stamped a caliber, someone picks up the case and is fool enough to try to chamber a wildcatted case in whatever the stamp says... could be a wild day or ride for them...
 
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If you are already worrying about it then it must be a bad idea??? I had no problem getting 243 brass and I will bet dimes to donuts I can drive down the road right now and buy 100 new brass in a local shop. Do you want remington or winchester :D
 
yodave said:
If you are already worrying about it then it must be a bad idea??? I had no problem getting 243 brass and I will bet dimes to donuts I can drive down the road right now and buy 100 new brass in a local shop. Do you want remington or winchester :D
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Very true yodave!! But I have very little patiencence for waiting!! Although in this case think I'll wait and try again next week for some new 243 brass!........Win brass please!!!....LOL!!

Perry
 
If you have a HACS gun show on anywhere in your neighbourhood you should check them out. Heritag Arms Collectors Soc. They do one almost every month in Burnaby. I was there yesterday to pick up some 30-30 brass and look for dies. Didnt find the dies but I noticed lots of the 243 brass bagged on the tables-maybe 5 or 600 at least. Great group to shop for that kind of stuff. The guy I buy from headstamp sorts, decaps and tumbles for $15/100. I have been getting my 308 and 30-06 from him for $12 until now. Also usually good prices on ammo. I usually can count on someone selling 308 or 30-06 for about $15 a box. Check their site and if you are in town when they are running a show I will take you there. My wife went with me this time and spent $250 on knives-she collects. Never did find that Marlin buttplate I was looking for either.:) If you will take once-fired brass, email me and I will give you his phone number.
 
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