My best accuracy load was for 350L was 125gr XTP .357. With 26gr of Enforcer. 2425fps. Chamber checker is a must,larger bullet can open case mouth if it doesn't seat correctly. .356 seems to be the sweet spot. 9mm(.355) velocities and accuracy were more variable.
@@mikesauer7775 I would agree .355 is more variable. Also your brand of brass is pretty important with chambering various bullet types. The channel PC bullet empire posted a good video explaining it. I use a Lyman chamber checker for 350L.
I believe a 350 legend is a .355 bullet just like a 9mm whereas a 357 is a .358 bullet. You'll want to watch your pressures. Once they are resized they are no longer .358 bullets. You can shoot .358 bullets from your 35 Whelen without resizing.
Some .350 legends are bored for .355 some for .357, .358 should be the size for cast lead bullets. If you buy a rifle check your bore, and buy, or reload for that size bore.
Okay so you need to make sure the your case is trimmed properly. Do you have a bore scope if not you can do a chamber case. You don’t want the case getting jammed into where the mouth of the case goes. Gotta remember the 350 legend head spaces off the case mouth just like a 9mm. If i were you I wouldn’t role crimp like a 357 I would be taper crimping my ammo. As for measuring your groups just open or put you calipers on the projectile your shooting (.357) then zero the calipers. And measure from edge to edge gives you the exact measurement your looking for.
I’m aware of everything you just mentioned. I measure groups at center to farthest center currently a lot of people disagree on the proper method. My reloads are also not crimped in the groove I simply just tried 5 of them for testing purposes. I explain in the video my current ones have the case mouth above the groove.
@@heavyleadenthuasist38 right on 350 legend is a very fickle cartridge it can a will ruin a guys day if your not reloading it properly. With that said people get wrapped around the axel about 350 legend too much. As long as your following the rules you will be fine sammi allows for I believe 3 thousands + or - in diameter. So you can size all the way up to .358 without issue.
