Reloading .300 Win Mag (I can spin the bullet in the case after seating, how do I correct this?)

[USMC88-93]

[Sixgun]

When you put the die in, did you back it off 2 turns from where it touches the shell plate. Maybe you back it off to much.
I'm thinking to much.

I am not a very good typer but know my stuff on reloading. If you would like I could come over after work some time to share my knowledge with you.

I think it's a good idea to start reloading with strait walled (45acp, 357,ect) cases before necked cases. I don't even want to tell anyone on my mistakes when I started.

[USMC88-93]

I think it's a good idea to start reloading with strait walled (45acp, 357,ect) cases before necked cases. I don't even want to tell anyone on my mistakes when I started.

Some on other forums want me to just spend the money on Redding or other dies instead of trouble shooting the lee dies.
Whats funny is the pistol stuff scares me more than these. As I would hate to double charge something.

When you put the die in, did you back it off 2 turns from where it touches the shell plate. Maybe you back it off to much.

[Sixgun]

OAL and crimp are two different functions of the die. You may have the seat to low, and the die too high.

Practice with a dummy round. Screw the bullet seat up quite a bit, and then tighten down the die till you get the preferred neck tightness. Once you get that, then screw the bullet seater to your desired OAL

I am starting to wonder this also. I always seat and crimp in 2 different stages. I don't even crimp magazine feed bullets. prolly with the 300 win mag I might.

[Sixgun]

Whats funny is the pistol stuff scares me more than these. As I would hate to double charge something.

I use a flashlight to look in all my case to see if anything looks more then the others. I do this with everything i load. Been there and done that.

[Hoser]

Always seat to depth and then crimp.

For the most part, crimping isnt needed with rifle ammo. There is plenty of neck tension to keep that bullet in place.

[DOC]

I've heard that crimping should be kept to a minimal amount because with cases like 45 acp you have to roll the neck out a little to get the bullet in the case without skinning it. Then you roll the neck back closed. Keeping the working of metal to the smallest amount so the case lasts longer. Your crimp seems to be to much and its uniform too so its clamped around it so it spins but it doesn't look like its going to come back out either.
Get a factory round and set your dies as close to that as possible for seating and use the crimper as light as possible just to get the neck to roll back around the round. That is what I would suggest doing. Good luck brother.

[rondog]

You said you didn't neck size because they're new cases? I think you should still neck size them anyway to ensure that the necks are the correct size. Just like you should never assume that new cases are the correct length either, or are full-length sized correctly.

I've always read that new rifle cases should be treated like used ones, and be re-sized and measured/trimmed for length like used ones, just to ensure they're actually right instead of assuming they are just because they're new.

[USMC88-93]

I've always read that new rifle cases should be treated like used ones, and be re-sized and measured/trimmed for length like used ones, just to ensure they're actually right instead of assuming they are just because they're new.

Thats what baffles me as I did full length re-size them with the appropriate die.

[rondog]

Thats what baffles me as I did full length re-size them with the appropriate die.

But you said "(Used the full length re-sizer and not the neck sizer die as these are new cases)", so I'm confused. Doesn't the full-length resizer also neck size at the same time?