What's the cause of this? The bullet jamming in the lands?Originally Posted by 1168
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Senior Member
What's the cause of this? The bullet jamming in the lands?
Member
Aero
IMG_5838.jpg
Bushmaster lower for comparison
IMG_5837.jpg
Member
For reference this is the round that required the mortar to clear...
IMG_5009[6205].JPG
Last edited by ksosay; 11-29-21 at 13:44.
Manufacturer
That seems like it could be pointing to a head space issue.
Black River Tactical
BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
BRT Bolt Carrier Groups M4A1, M16 CHROME
BRT Covert Comps 5.56, 6X, 7.62
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That can happen with some bullet profiles and chambers that are pretty short. Sometimes mortaring will get you a gunpowdery mess in that case. Happens with some handloads with pistols, too.
Other times, I really don’t know. And in his pics, I don’t see rifling marks. I have a hypothesis that the bulge in the case from the bottom of 147s make some stick in tight chambers, but I really don’t know. It happens, but I’m not sure of the cause.
I don’t know for sure if this is applicable in OP’s gun and ammo.
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Looks correct.
Member
Thanks for confirming.
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Unfortunately, it does not solve your problem as I hoped.
Member
It's all good, makes sense to check the simple stuff 1st, it's a machine it'll get sorted out, time and patience will prevail.
Member
Not something I'm familiar with diagnosing, any suggestions as to how to start to rule it out?
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