It’s also worth noting that the push is longer than my fired brass. I double checked that as well. My die is set up for the pull with a .002” bump. 1.6590” fired.
It’s also interesting that my bushing is .308” but bushing only yields .306”. I would have thought bigger if anything.
No...
Interesting results. It appears the shoulder is shorter on the pull than on the push. I thought I might have gotten confused so I replicated it. Only an assumption but is it possible the lack of time between the bushing and the mandrel on the pull…. Hell I don’t know.
Push 1.6611 average...
Hopefully I’ll find time today to check it out myself. I have a good bit of sizing to do today with the SAC. the last 5 I’m going to pull the mandrel out, size with the bushing only, put the mandrel back in and size the neck pushing. I’ll take measurements and record it here.
The Zero is nice but I can’t say for certain I would buy again. The T-7 is a pretty impressive unit itself and I still use it for .260 and 45 Colt instead of changing heads on the Zero. Yes, the .260 is precision ammo. I wasn’t compelled to change.
I guess I’m going to have to do some testing with my SAC with and without the mandrel and take some measurements. I had no idea this theory existed and feel almost no resistance when I pull the mandrel out of the brass. Never too old to learn.
I see your point. I didn’t consider that it may distort the shoulder from the pulling effect. I never thought about that with an expander ball either since that’s always just been the way. For me the mandrel is for concentricity. Less run out and consistent neck tension.
CK1.0 one of us does not understand the SAC die.
The Mandrel goes freely through the neck of the unsized brass and the top of the mandrel is a smaller dimension allowing the shoulder/neck bushing to set the neck tension tight. Then on the upstroke (of the handle) the mandrel opens the neck...
Are you sure your bushing is giving the tension you think it is. .003”. I’m not doubting you but there may be more spring back there than you are aware of. Obviously if you’ve used this same bushing before the mandrel you know what’s going on with it already.
With the bolt removed I scribed the inside of the stock with a dental pick. Then removed the action and grabbed my small files and went to work. Carbon fiber is very easy to remove so don’t get carried away.
I opened mine up to fit. TL3 left bolt right eject. Manners with the mini chasis. I think it came out good considering it’s a left handed stock that had no cutout for the port at all.
I’ve spent plenty of time on the phone and e-mail with manners. Nothing but great customer service.
Is it possible the gunsmith is the weak link? Did he order the stock or did you? Is there an outstanding bill floating around somewhere?