243 WSSM Anyone Shooting It?

[rcw3]

I have a reamer, brass and dies for a 243 WSSM but I am wondering if anyone is shooting it with any success. I was going to shoot Berger 105 VLD's out of whatever barrel I had chambered. My decision on the neck diameter of the reamer was a bit arbitrary and I selected .281" for the chamber, which puts me around a .278" neck turn diameter for a loaded round. Now I am wondering if I should have taken the neck of the reamer further down. With new brass I could manage one pass with the neck turner and go down to .278" but it seemed if I had to go down much more, I would have to do the necks with two turn downs. Factory brass loaded measures around .283" at the mouth and about .286" at the junction of the neck and shoulder - pretty thick stuff.

Anyone have any input or comments on the 243 WSSM and its accuracy, neck diameter, etc. would be appreciated.

Robert Whitley

 

[6.5fan]

243wssm

I have a reamer, brass and dies for a 243 WSSM but I am wondering if anyone is shooting it with any success. I was going to shoot Berger 105 VLD's out of whatever barrel I had chambered. My decision on the neck diameter of the reamer was a bit arbitrary and I selected .281" for the chamber, which puts me around a .278" neck turn diameter for a loaded round. Now I am wondering if I should have taken the neck of the reamer further down. With new brass I could manage one pass with the neck turner and go down to .278" but it seemed if I had to go down much more, I would have to do the necks with two turn downs. Factory brass loaded measures around .283" at the mouth and about .286" at the junction of the neck and shoulder - pretty thick stuff.

Anyone have any input or comments on the 243 WSSM and its accuracy, neck diameter, etc. would be appreciated.

Robert Whitley

I have shot this cal.I would go with a smaller neck diameter.my first chamber was cut with a reamer that had a .285 neck.the second chamber I had a .278 neck match reamer made.the second chamber the brass seals chamber better,even without anealing.I will still aneal though.I am testing mine right now with 115 bergers.I have shot some groups that were very respectable at 100 so far .will be testing more and shooting it at 1k in april.