Cartridge Hard to Chamber

[RonS]

I think I discovered what my issue is, my R788 originally was a 308 so its a long action so when I extract a cartridge it hits something and causes the dents I was seeing on the mouth of the case. If I hold the case as I extract it it has no marks on it. When I cycle the bolt normally the case flips around backwards and stays in the gun, this is when I think its dinging the case mouth. Is this due to a strong ejector spring?

 

[DaveTooley]

My guess is you have a scope with a large windage turret on it. The case hits the turret and flips back into the action. Common with ejection angles that angle up.

 

[AlNyhus]

Interesting

Boyd, this morning I measured a new Norma 6BR case and a new Lapua 6BR case for comparison. Both cases are recent production. Measurement 'A' is the very rear of the solid case head, right before the extractor groove starts. Measurement 'B' is .200 ahead of the rear edge of the extractor groove.

Norma 'A'- .4670
Lapua 'A' - .4695

Norma 'B'- .4655
Lapua 'B' - .4674

For guns with the original Remington spec. BR chambers, the Norma cases are a viable alternative to rechambering for the Lapua cases. Simply trim the neck on the Norma 6BR and you're in business. My suspicion is that the original poster might consider this approach to get ahead of the problem if his chamber proves a bit snug for the Lapua cases.

Here's two that I use the Norma 6BR case in.

The top one is a 22BR with the original Remington 'BR' spec. chamber (1.520 long). Norma 6BR cases are run through a Redding 22BR Body Die, trimmed to 1.500 and then neck turned for the .245 chamber neck. It's my go-to rig for fox and coyote hunting. No safe queen....home brewed camo paint, beat up, dinged up, scratched up, hunted hard and heavily bloodied...literally. Ted Nugent's signature and Spearchucker stick figure adds some good Karma and cred to it.

The bottom one is a 6BR 'dog gun with a Lapua spec. chamber and .265 chamber neck. When it was finished, there wasn't any Lapua brass to be had so I used the Norma to start with. I've tested the Lapua cases back to back with the Norma and if there's any accuracy difference, I can't see it. The 25 Norma cases I started with have been fired over 20 times with no loose primers or lost cases. Loads are 55 gr. Nosler BTip @ 3,700 so they get leaned on pretty hard. Ditto the Nugent connection on this one, as well.

For what it's worth. -Al

 

[BoydAllen]

Boyd, this morning I measured a new Norma 6BR case and a new Lapua 6BR case for comparison. Both cases are recent production. Measurement 'A' is the very rear of the solid case head, right before the extractor groove starts. Measurement 'B' is .200 ahead of the rear edge of the extractor groove.

Norma 'A'- .4670
Lapua 'A' - .4695

Norma 'B'- .4655
Lapua 'B' - .4674

For guns with the original Remington spec. BR chambers, the Norma cases are a viable alternative to rechambering for the Lapua cases. Simply trim the neck on the Norma 6BR and you're in business. My suspicion is that the original poster might consider this approach to get ahead of the problem if his chamber proves a bit snug for the Lapua cases.

Here's two that I use the Norma 6BR case in.

The top one is a 22BR with the original Remington 'BR' spec. chamber (1.520 long). Norma 6BR cases are run through a Redding 22BR Body Die, trimmed to 1.500 and then neck turned for the .245 chamber neck. It's my go-to rig for fox and coyote hunting. No safe queen....home brewed camo paint, beat up, dinged up, scratched up, hunted hard and heavily bloodied...literally. Ted Nugent's signature and Spearchucker stick figure adds some good Karma and cred to it.

The bottom one is a 6BR 'dog gun with a Lapua spec. chamber and .265 chamber neck. When it was finished, there wasn't any Lapua brass to be had so I used the Norma to start with. I've tested the Lapua cases back to back with the Norma and if there's any accuracy difference, I can't see it. The 25 Norma cases I started with have been fired over 20 times with no loose primers or lost cases. Loads are 55 gr. Nosler BTip @ 3,700 so they get leaned on pretty hard. Ditto the Nugent connection on this one, as well.

For what it's worth. -Al

Thanks for all of that. It makes me smile. Excellent

 

[RonS]

My guess is you have a scope with a large windage turret on it. The case hits the turret and flips back into the action. Common with ejection angles that angle up.

I have a Weaver T-36 mounted on it, I never thought of that one. If so, I think I have a lesser powered scope I can swap out with other scope with shorter turrets. Thank you sir

 

[RonS]

Here’s a pic of my first 20 break-in shots at 100 yards, I didn’t have time to finish my complete process…

 

[AlNyhus]

Takes about 5 minutes to remove the ejector and spring. Then you'll know for sure. -Al

 

[RonS]

Takes about 5 minutes to remove the ejector and spring. Then you'll know for sure. -Al

Will the extractor still eject the spent round?

 

[Shawnba67]

My 788 in dasher requires brisk bolt work to reliably eject a case. It was a 22-250 originally.

 

[RonS]

My 788 in dasher requires brisk bolt work to reliably eject a case. It was a 22-250 originally.

I will try that also....thx

 

[butchlambert]

The extractor only pulls the cartridge, the ejector pushes it out.

 

[RonS]

The extractor only pulls the cartridge, the ejector pushes it out.

LOL, thanks for the correction, that’s why I shouldn’t text while multitasking at work. So would cutting a loop or two from the ejection spring help my issue?

 

[MGYSGT]

Tight neck chamber

 

[AlNyhus]

Tight neck chamber

He states the chamber neck is .310, which is the SAMMI spec. for the 7BR. Factory 7BR chambers are usually .310-.312.

What his necks measure with a bullet seated isn't known. But that another area that should be checked, especially if he's not using Remington 7BR cases.

Good shootin'. -Al

 

[RonS]

Tight neck chamber

.310

 

[AlNyhus]

Soooo....what does the neck measure with a bullet seated? -Al

 

[RonS]

Well I just got back from the range, I loaded a few Sierra 120gr SP in front of IMR 8208 in the 7BR. The loaded necks were .308 with Lapua 6BR brass. Here’s my best 3 shot group at 100 yards…