Grendel Ejection Issue MDI build
- Thread starter Shooter1971
- Start date
First you have to figure out what barrel then match the correct bolt to the correct barrel. There are type 1s with .125 bolt face depth which is considered the original Grendel bolt, while there are also Type 2 at .136 identical to the 7.62x39mm.
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Thanks...narrows it down to the bolt. The bolt face on mine is smaller then .439, shaves a bit of brass off the rim on the Hornady's
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I have an Odin bcg also. I guess I need to check it before I use it!
2 Rifles with Odin barrels and BCGs in 6.5 Grendel. Both had trouble ejecting Starline brass. It would get hooked on the extractor as it ejected and would stovepipe and get swapped end for end inside the action.
Hornady brass works fine though, so I'm surprised by yours. I would contact Odin, maybe your bolt is out of spec.
Hornady brass works fine though, so I'm surprised by yours. I would contact Odin, maybe your bolt is out of spec.
Appears to be out of spec bolt. I contacted Odin. I've had it for a year waiting for my MDI receivers so might be out of luck. Odin been really good to me so far so hopefully they will help out still
Good to know, I was just going to order Starline brass, guess I'll have to try and find some more Hornady.
Took extractor and ejector off, definitely a brass to bolt face diameter issue. Interference fit as seen below. Can anyone confirm what the Hornady Brass normally measures on the the rim
Copy and paste from Wiki
Parent case .220 Russian[2]
Case type Rimless, bottleneck
Bullet diameter 6.71 mm (0.264 in)
Neck diameter 7.44 mm (0.293 in)
Shoulder diameter 10.87 mm (0.428 in)
Base diameter 11.15 mm (0.439 in)
Rim diameter 11.2 mm (0.44 in)
Rim thickness 1.5 mm (0.059 in)
Case length 38.7 mm (1.52 in)
Overall length 57.5 mm (2.26 in)
Case capacity 2.3 cm3 (35 gr H2O)
Rifling twist 1 in 8" or 1 in 9"
Primer type Small rifle
Maximum pressure 52,000 psi (AR-15 bolt), 58,000 psi (case strength)
You can also look at your reloading books for SAMMI cartridge specs.
If they won't warranty it at least it should be a quick and easy fix to open up the bolt face a hair.
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I actually think that a little polish of the extractor blade would fix it, but since I don't have a spare extractor I'm not going to experiment.
I was considering ordering a bulk box of 3000 Hornady brass but would need to sell half of it, and not sure how much demand there is.
I checked my bolt today. The recess measures .450" diameter, so I'm good.
