.260 Rem throat length

[prevost12]

I recently got a 260 Rem. When I first tried a box of nosler factory ammunition the bolt wouldn't close. I gave it the sharpie test and sure enough the bullet was well into the rifling. I came home and made up a dummy round to test where the rifling starts. With my Hornady bullet comparator I was getting about 2.132". Is that not well below normal? I have tons of room in the magazine and the fact I couldn't chamber factory ammo isn't good.

I figure this forum group was the most likely to have background dope on the 260. Thanks in advance.

 

[prarie_boy]

Have you tried any other factory ammunition in the gun? And when you made the dummy round were you using the same type bullet as the box of nosler ammunition?

 

[prevost12]

It's the only factory ammunition that was avaialable to me as it's not the most common cartridge. I did test rounds to check bullet seating with both the 120gr BT from the factory ammo as well as with a 143gr ELDx. Both have to be seated super far back into the case in order to not be jammed into the lands. Like I said, I'm making contact around 2.135" which should be well below spec. I believe.

I'll probably bring it by the gunsmith and see if they can recut the chamber and lengthen the throat.

 

[furtaker]

no need to recut the chamber. Just have them use a unithroater to set your FB where you want it

 

[JEC]

Thank your lucky stars, most 260s are throated on the long side of SAAMI ... try a different weight bullet.

 

[prevost12]

Have the throat lengthened a bit seems to be the solution. My gunsmith seems confident it will be an easy procedure. In some ways it works out because I know I'll be able to get to the lands while staying within the magazine limitations.