300 Wby Mag to crimp or not to crimp?

bcfreeman

bcfreeman

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I just started reloading my 300 Wby. Mag
I loaded some 168 gr Barnes TTSX with IMR 4350 at 75.5 grains
I have read that crimping isn't a necessity but I'm wondering what you guys have experienced with positives or negatives of crimping this caliber?

If I want to compare some crimped rounds to non crimped rounds is it possible to put an already loaded non crimped round into my crimp die and crimp it still?
I've got 20 rounds loaded up and was thinking of crimping some of them to do a comparison.
 
I use a Lee crimper and am a big fan of it. In my 300 wm I crimp them all. I have had no change in accuracy. I like the bullets held tight.
 
I on the other hand do not crimp, and have never seen the need too. I neck size only, and keep the neck tension fairly tight. It seems to hold the bullets just fine. The less I work the brass the better is my motto.
 
I own several makes of dies. Most of them seat the bullet pretty tight without crimping. Example: An RCBS 2 die set for the .270

However, with my LEE 3 die set for the 8x57mm it expands the mouth of the neck enough that the bullet spins freely after seating so I end up lightly crimping the neck.

No big deal either way if it's a bottleneck cartridge that you use for hunting.
 
I load for the 300 Weatherby and I crimp all of my loads. The Weatherby hands out substantial recoil and therefore the cartridges left in the mag box WILL feel the effects. Most Weatherby ammo is pretty long and fits fairly snug in the mag box.
All factory ammo comes with a firm crimp. There must be a reason for this!!!
I trust all my crimping to a Lee factory crimp die and you can too !!!
Thunder
 
Bottle neck cartridges such as the 300 WHBY Mag, do not require crimping when used in a bolt action rifle. It's one extra step not needed. I load for this caliber and have never had to consider crimping necks.
 
I have never crimped any centerfire rifle except those rounds that will be in a tubular magazine [M94 & 92 Winchester, 336 Marlin, 1893 Marlin, etc]
Never have seen a need. Eagleye
 
I don't crimp for any of my rifle cartridges, including .338 Win Mag, and have had no issues with bullets moving. It is just another step to introduce inconsistency and that is to be avoided, IMO.


Mark
 
Hey guys thank you all for your reply's. I fired off 20 of my first hand loads today at the range that were done without crimping and I'm very, very happy with them.
I've never got factory ammo to group like I did today with my hand loads :)

I checked all the bullets to see if any of them spun free in the casings and they were all very tightly in.

I'll have to agree with Eagleye. I think if it was a lever tube mag I could see a reason for the crimp but I just can't see it with how nice and tight my Lee press regular die is seating them.

I did a bunch of internet reading about the subject and can't find any thing that says crimping will help with velocity or trajectory so I think I'll just stick to my regular die.

Thanks again guys!
 
However, with my LEE 3 die set for the 8x57mm it expands the mouth of the neck enough that the bullet spins freely after seating so I end up lightly crimping the neck.
Click to expand...

Get a proper die, that provides adequate neck tension,crimping to make up for inadequate neck tension is a poor practise.
 
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