Christensen 300 Mag problems and help needed

[christian1]

Purchased a slightly used Christensen Ridgeline 300WM. Gun has 80 rounds through it. Loaded up some 189 Hammers in new Nosler brass with 7828ssc. Started at 74 grains ( I was getting around 3000fps). After my first group I began to have extraction problems. The bolt would lift easily, but I had to really work to get the spent casing out--and I mean REALLY work. Came home and messed with it a bunch. Each time I put the spent casings back in the chamber I would have the same problem. So I FL resized the cases and BAM!!! Problem solved. They ran through easily. Any thoughts???

 

[AC300win]

You didn’t mentioned if your nosler brass was new and whether you sized it or not. Perhaps a slightly tight chamber and the belt area of the brass expanded while firing. Have you reloaded and fired your once fired brass yet to see if you still have a problem. Not assuming anything but in your FL sizing did you check your headspace and only bumped shoulder .002? Buddy has same gun and shoots Berger 215’s lights out.

 

[christian1]

New Nosler brass that I FL resized. I just ran the sizing die per the directions on the first round since it wasn't fired. I aim to bump it back after I shoot it.

chris

 

[Lawnboi]

Measure your brass before and after, maybe excessive brass growth?

 

[christian1]

Measure your brass before and after, maybe excessive brass growth?

That's what I thought might be a possibility. I just don't know why that would happen. I have never had that happen before.

chris

 

[AC300win]

Assuming no pressure signs? As noted above , getting measurements of your sized and fired brass would tell you if you just need to make some adjustment with your sizing die.

 

[Harvey_NW]

This is the exact reason why I ditched belted magnums. If you have a tight chamber a standard FL die won't size close enough to the belt and may require a collet die to get it back to where it will chamber and extract easily.

 

[mossyoak52]

You have a tight chamber ,Long range only websight/forum has a thread on this issue they also have a chamber reamer that fixes it it's also a problem with the 6.5 prc and 300 prc

 

[grimm158]

I had this issue with my Mesa. After the chamber got a little dirty, I couldn't extract rounds. During my last elk hunt, after I dropped the elk, I had to literally beat the bolt open with my fist to get the case out. I sent the rifle in to Christensen and they polished the chamber but I haven't shot it yet to tell if if it's any better or not.

 

[BBarnett13]

If it's a brass issue, you may need to get one of these.

Innovative Technologies - Reloading Equipment

Our patented resizing die can reload Winchester, Remington and Weatherby belted magnums up to 20 times, instead of just 2 or 3 times and the top of the die is a chamber width gauge.

www.larrywillis.com