243ai trim to length ?

[mule]

need to know trim to length please,

 

[MrMajestic]

Ahhh, same as the parent case. ???

 

[savagedasher]

Depends on the reamer used. Larry

 

[Preacher]

Your chamber, and your's alone will tell you the exact number to cut to, any thing else will just be a good guess...

 

[Randfal]

I've got 3 reamers and they all run the same as factory length necks. 95% of the time, the fired brass will have shortened necks as the some of the brass "pulls back" as the shoulder is formed. So, you normally don't ever have problems with the necks being long. But that still leaves the question of, "How long to you trim them too?" Since they are all likely to be a fuzz shorter than what you started with, pick the shortest one, clean it up and then trim all the longer ones to match it. That will keep all your lengths uniform. Just note the length so you can keep an eye on the growth. Just make sure they don't grow past the standard 243 OAL and you will be fine.

 

[mule]

thanks for all the info

 

[Ackman]

need to know trim to length please,

Ignore published trim-to length, don't even worry about it. Get a Sinclair gauge plug and find out how long your chamber really is. You'll discover it's much longer than the brass. Those AI cases should never need trimming.