I hope nobody is gettin tired of my dumb questions yet. Anyhow I recently purchased a Browning A bolt in 300 win mag. I have noticed the case is crimped at the base of the bullet, Why is that and is it required for reloading? How do i do that if it is required? Anyone work up any real great loads in 330 win mag for elk? Thanks everyone for all your help. I am really enjoying this reloading, but I still dont know alot about it, Just pluggin along

The secondary crimp below the bullet on your factory ammo is there as insurance the bullet won`t seat deeper during recoil. I don`t have any experiance with the 300 mag, but I don`t see the need for the second crimp myself. Various manufactures also put them on handgun ammo and I`ve loaded scores of heavy 44 Mag and 45LC along with 357s and never had a bullet move in them when a proper crimp was applied.
I don`t know of any way to apply one to your cartridges when reloading them and wouldn`t worry to much about it. I doubt you`ll find many that even use a crimp on their magnum ammo and I haven`t heard of anyone haveing troubles with bullet movement.
The only way to find a good elk load for your rifle I`m aware of, is to pick a suitable bullet and try a few recommended loads from your manual. Check for accuracy and velocity as you work them up and go with your best balanced load. No one can say for sure what will perform best in your rifle except you.

Lee advertises that the crimp also produces more uniform ignition and thus better accuracy. Of course they also sell specialized crimping dies.

A couple of guns that I have experimented with have shot extremely well with a crimp so I bought the Lee crimp die for them (375H&H & 22.250).

I have a 300 Weatherby and I don't crimp it. Never had a problem. Shoot Max loads with 220 Gr. bullets. I do crimp for two of my guns 44 Mag with Max loads and my Weatherby .378.

FJOLD, I cant seem to stop staring at your avater. I dunno , I cant explain it, O.K. though, Thanks you have helped out alot. i know I need to find a load that works well for me and my gun, I was just asking if anyone had worked up a load they liked to give me a place to start. I guess the general concensus is no crimp required so i will go woth that. Thanks for setting a newbie straight.

Hey gunz

I load for 5 300 win mags and all of them like the Barnes TSX best. 2 I load with 180 gr TSX in front of 76 gr RL22 and the other 3 I load with 200 gr TSX in front of 74 gr RL22. Been through a lot of different bullets like Trophy Bonded Bear Claws, Scirroccos, Accubonds, Nosler Partitions, and Fail Safes. Killed an Elk this past season at 245 yards with the 180 gr TSX and both bullets went where they were supposed to and did the job.

About crimping. It should not be necessary but I use a Lee Factory crimp in every caliber

http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=586092

With these dies you don't have to be on a cannelure and you can crimp a little or a lot by adjusting it. Then you don't have to worry about your bullets moving. Lots of reloaders here use them

https://forums.accuratereloading.com/eve/forums/a/tp.../798100962#798100962

The secondary crimp eliminates bullet setback during feeding in semi-auto rifles.