RFB initial thoughts, Range report ***JANUARY 31st ammo test at bottom of OP***

daragans said:
How are your groups?
Click to expand...

I've only been out to shoot my rfb twice. The second time was with the cheekrest, it made a huge difference by not having my face touching bare metal in -20 weather.

I haven't shot for groups yet, just to get it functioning 100% and zero my optics.
 
I hope I am able to shoot groups like that with a good load. If the RFB can shoot groups like that and I find the load my barrel likes and only shoot that through her. I nearly sold mine this week for 1100 over retail a couple of days ago because I was worried about reliability and accuracy. After I took pictures of it and held the rifle again I couldn't follow through so I backed out of the deal. Sure glad I did.
 


Nice work daragans !

I have been told that my RFB likes the 155ish bullets vs. the 168/175 stuff as well. I'm just waiting for conformation from the tester.
 
At the range last weekend shooting the RFB. Everything was going well then after a shot the rifle jammed. I could not pull the charging handle back to clear. After disassembling the receiver, I discovered that the brass looked like it was "fired formed" over the ejection ramp. I suspect somehow the extractor is out of position and slamming the brass hard into the ejection ramp and missing the ejection chute. I did not see anything obviously wrong with the extractor and when I insert a dummy round into the extractor claws it moves freely upwards. Any other ideas as to what might cause this?

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_DSC7852.jpg
 
Measure the thickness of your bolt, it should be .4095" also put a cartridge into the extractors when you have the bolt out of the gun. The extractors should spring to the upward position freely when gripping a case.

Also it could be mag related.
 
Throttle_monkey1 said:
Measure the thickness of your bolt, it should be .4095" also put a cartridge into the extractors when you have the bolt out of the gun. The extractors should spring to the upward position freely when gripping a case.

Also it could be mag related.
Click to expand...

The extractors do spring freely to the upward position with a dummy round inserted. I will go measure the thickness of the bolt.

This problem only started on the last range trip, so I am not sure what has changed or broken since. It happens with both the original mag and the new 5 round mags. It did not do it for every round, but enough times that it is a problem.
 
Strange...
Brass is annealed, reloaded cases?
Anyway, if you reload try to pull 10 rounds and weight powder. I had same problem with SA ammo. Weight difference was 2.1 grains in them. M-14 was choking every 5-6 rounds.
Second, RFB is 7.62x51, I was resizing brass today and it was streatched. I ordered stoney point gauge to measure shoulder grow. It was hard to resize.
Try to change ammo, it also looks rough on brass surface.
Hope this will help.
 
daragans said:
Strange...
Brass is annealed, reloaded cases?
Anyway, if you reload try to pull 10 rounds and weight powder. I had same problem with SA ammo. Weight difference was 2.1 grains in them. M-14 was choking every 5-6 rounds.
Second, RFB is 7.62x51, I was resizing brass today and it was streatched. I ordered stoney point gauge to measure shoulder grow. It was hard to resize.
Try to change ammo, it also looks rough on brass surface.
Hope this will help.
Click to expand...

I was using brand new factory PMC Bronze 147gr ammo. I am going to try some other ammo next trip to then range. What surprises me is that I never had this issue until recently and I have been using the same PMC ammo. I have sent Keltec an email to see if they have encounter this before. I couldn't find anything similar on the KTOG forum.
 
Ngyukon said:
At the range last weekend shooting the RFB. Everything was going well then after a shot the rifle jammed. I could not pull the charging handle back to clear. After disassembling the receiver, I discovered that the brass looked like it was "fired formed" over the ejection ramp. I suspect somehow the extractor is out of position and slamming the brass hard into the ejection ramp and missing the ejection chute. I did not see anything obviously wrong with the extractor and when I insert a dummy round into the extractor claws it moves freely upwards. Any other ideas as to what might cause this?

_DSC7855.jpg

_DSC7848.jpg

_DSC7849.jpg

_DSC7847.jpg

_DSC7852.jpg
Click to expand...

I had mine out to the range today, and using Remington and two types of Federal ammunition, none of the brass appeared as beaten up as indicated in your pictures.
I suspect something major going on here and would be interested in what Kel-Tec had to say......
 
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