So, I recently bought a mossberg patriot chambered in 300 win mag from Buds, process went smoothly as usual, have loved the gun.
I also purchased from buds a box of 20 Winchester super x, and it went smoothly as well. All fired perfectly

I then purchased two boxes of the same ammo, and some rounds will not let the bolt go all the way down. I think out of 40, 7 or so will not properly chamber. Is it an issue with my gun? Or the ammo?

I apologize in advance if this isn't the place to ask

Question

So, I recently bought a mossberg patriot chambered in 300 win mag from Buds, process went smoothly as usual, have loved the gun. 
I also purchased from buds a box of 20 Winchester super x, and it went smoothly as well. All fired perfectly

I then purchased two boxes of the same ammo, and some rounds will not let the bolt go all the way down. I think out of 40, 7 or so will not properly chamber. Is it an issue with my gun? Or the ammo?

I apologize in advance if this isn't the place to ask

James G. · Answer

Allen, this sounds like you may have got a bad (slightly out of spec) lot of ammunition. Check to see if the rounds are uniform length, bullet seat depth and crimp wise. Super X should be at your local stores to try a box or two to confirm. If another box works, only buy that lot number. if you get the same hang ups then it may be an issue with your rifle. Just for your information, Mossberg's phone for Service Inquiries is U.S. (800) 363-3555 | 8:00am-4:30pm Eastern time.

Steve P. · Answer

Wow I'm sorry to hear that you had issues with this ammo Allen. I would give Winchester a call. I've done this before and they've sent me out a case of ammo after making a complaint.

Randy I. · Answer

I would try a different brand of ammo and contact Winchester with the ammo specs and lot number

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