Jack Neary: Brass prep for Benchrest part 2 

I would like to know too.

It’s based on the reamer that was used. For correct trim length just check the print for the reamer used to chamber your rifle

I hope you learned what not to do

Some people ONLY neck size, no full length size. They're not usually used together

No offense bud, but if you're asking that question you probably shouldn't be reloading. The short answer is yes. At a minimum they should be resized, then measured for overall case length, before being reloaded. If your case is too long and you drive the mouth into the front of the chamber where it doesn't have room to move, you're basically shoving a cone, tight inside another cone...then releasing 44,000 psi behind it. Best case scenario your gun doesn't shoot for crap, middle case scenario, the case is too long and the gun jams, trying to load. Worst case scenario, the gun explodes in your face because the chamber pressure skyrockets and can't release pressure fast enough. (These guys are/were naively nuts) On a side note, not all brass grows at the same rate. High pressure, bottleneck carriages grow the most. Low pressure straight wall cases grow the least. (Example: a 45 auto case would be completely junk before it grew enough to ever need trimming)

@@EitriBrokkr Oh sorry for the misunderstanding. I know all of that. I meant for fine tuning MOA. With the tube magazine attatched to the barrel, the barrel harmonics are only so sensitive so no tuner would be useful. Was wondering if there was a sweet spot for trim length on a lever action.I will find out myself, I just dont get out much lately

@@vdog4799 I don't know why you'd think a tuner would be useless. All barrels have harmonics. All it does is letting you manually adjust the harmonics. That being said, they are kind of a scam, because you can tune your reloads to your barrel. The only reason to tune your barrel to your ammo is A. You're lazy and B. You only shoot factory ammo.

@@EitriBrokkr 👍

Tuners are used in high level F-Class and Benchrest competitions. You don’t think we know how to load ammo or tune ammo to barrel? 🙄 Tuner add another layer of tunability. It allows us to get the most out of our handloads.