2 cannelures on 265 gr. Hornady's. Why?

[Rugerman]

I reload for my son and his .444 Marlin. I mostly load the 265 gr. Hornady. I bought a new box of bullets and the bullets have two cannelures on them: one in the usual place and one much further down near the bottom of the bullet. I assumed that this extra cannelure lower down was for reloading the round in the Leverevolution brass since it is .25 inches shorter than the normal brass however if you seat to the lower cannelure you are still quite a bit over the COL recommended by Hornady. Can anyone tell me why they put two cannelures on this bullet?

 

[jethunter]

I don't know for sure on that bullet, but the second cannelure may be the interlock cannelure (as in Hornady Interlock Bullets).

 

[Rugerman]

I don't know for sure on that bullet, but the second cannelure may be the interlock cannelure (as in Hornady Interlock Bullets).

It is an interlock bullet but I have used this bullet weight a lot before. I must have got a new batch with that feature? I just used up a box of them but they didn't have two cannelures but maybe they weren't interlock either. If that is what it is, what exactly does the second cannelure do?

 

[Lefty Dick]

The last few boxes I've bought have had the double cannelure.
One is for proper OAL for cycling in leverguns and revolvers, the second is for singleshots.
Lots of the larger weight pistol/rifle caliber bullets sport them.

 

[jethunter]

It is an interlock bullet but I have used this bullet weight a lot before. I must have got a new batch with that feature? I just used up a box of them but they didn't have two cannelures but maybe they weren't interlock either. If that is what it is, what exactly does the second cannelure do?

My understanding is that Hornady Interlock bullets use a type of cannelure to "lock" the bullet core to the jacket.

 

[senior]

My understanding is that Hornady Interlock bullets use a type of cannelure to "lock" the bullet core to the jacket.

I may be wrong but if I remember correctly the "cannelure" to lock the bullet core in Horns is on the inside of the case. The double outside cannelure is for diff load lengths to suit diff rifles. eg, levers vs SS

 

[Boomer]

As Senior says, 2 cannelures gives you a choice of cartridge length. A .44 magnum revolver is severely restricted in the OAL of the cartridge while a rifle in .44 magnum or .444 can be longer. This bullet enjoys wide use in all 3 applications.

 

[Johnn Peterson]

As Senior says, 2 cannelures gives you a choice of cartridge length. A .44 magnum revolver is severely restricted in the OAL of the cartridge while a rifle in .44 magnum or .444 can be longer. This bullet enjoys wide use in all 3 applications.

My initial experience with the performance of the 240gr factory load on Moose convinced me, better bullets had to be available. At that time, the Hornady 265gr appeared to be the answer and that was confirmed by the results on the next two Moose and a couple of Mulies. As a result, I picked up four boxes. After seeing this thread I checked and mine are o...l...d, single cannelures. One box left, I guess before too long, I'll run out.

 

[Rugerman]

I may be wrong but if I remember correctly the "cannelure" to lock the bullet core in Horns is on the inside of the case. The double outside cannelure is for diff load lengths to suit diff rifles. eg, levers vs SS

I load for single shot rifles and I don't crimp them. I feel this can adversely affect accuracy. I thought most people didn't crimp single shot rounds. Hmmm, more food for thought. . . .