KTOG - Kel Tec Owners Group Forum > KelTec Products > RFB High Efficiency Rifle > Feeding issues with Thermold Magazines


Reply
 
LinkBack Thread Tools Display Modes
Old 03-17-2012, 10:51 PM   #1
Bullitt2075
 
Join Date: Nov 2011
Posts: 69
Default Feeding issues with Thermold Magazines

Guys I'm hoping that I'm not the only one having feeding issues with the Metric THERMOLD mags for the RFB. When I use the Steel mag that Kel-Tec supplied with the rifle I never have a problem with bullets feeding. With the Thermold Mags I'm seeing about 2 rounds per mag hang up on the feeding cycle. This causes the bullet to get jammed and I'm seeing the bullets getting jammed back in to the case and the cases getting square mouthed.

Anyone else seeing this? If so, is there a solution?



__________________
Bullitt2075 is offline  
 
Reply With Quote Quick reply to this message
Old 03-17-2012, 11:46 PM   #2
GFF
 
GFF's Avatar
 
Join Date: Sep 2011
Location: The sticks
Posts: 291
Liked 2 Times on 2 Posts
Likes Given: 43

Default

When is the mag messing up first couple rounds last couple rounds or randomly?



__________________
GFF is offline  
 
Reply With Quote Quick reply to this message
Old 03-18-2012, 03:04 AM   #3
ronmar
Grand Poobah
 
ronmar's Avatar
 
Join Date: Oct 2010
Posts: 1,130
Liked 91 Times on 75 Posts

Default

Well the only thing I know of that will cause a case to get a square mouth is when it hits the upper feed ramp straight on instead of riding up on top of it. The two things that I think could cause this are a failure of the extractors to fully lift the ejected case. Or the gas system receiving too much gas(vent closed too far) causing the carrier to slam against the buffer plate/pad and shake the case loose from the extractors to jam against the upper feedramp. I guess a weak recoil spring or broken recoil spring tube could cause the symptom of too much gas, but you would also probably experience failures to go fully into battery along with it.

So first I would suggest you check your gas adjustment(1 click closed from the most open setting that still locks the bolt open on an empty mag).

The FTF you describe I have only seen with really long ammo(COAL 3.015"). They were also boat tail hollowpoints. The tip hangs on the tiny flat face at the base of the lower feedramp up into the chamber and the carrier/bolt inertia seats the bullit a little deeper in the case.

I like my thermoulds, they haved worked great so far.

What ammo are you running?
How many rounds do you have thru the rifle?

__________________

Last edited by ronmar; 03-18-2012 at 03:13 AM.
ronmar is offline  
 
Reply With Quote Quick reply to this message
Old 03-19-2012, 04:07 PM   #4
Bullitt2075
 
Join Date: Nov 2011
Posts: 69
Default

GFF, It seems to be random

Ronmar, I'm seeing this issue only with the Thermold Magazines. If I use the Metal Magazine supplied by Kel Tec I'm not seeing any problem.

As far as the ammo, they are my Hand Loads. 168gr HPBT bullets loaded into Lake City 7.65x51 Brass. OAL of 2.800" with 42.5gr of Ramshot TAC powder.

I also bought some factory Winchester 145gr ammo and I'm still having the same feeding issues with the Thermold Mags. I did verify that I bought the Metric Versions.

I tried loading just 19 rounds to see if that fixed the issue, no luck.

Also this rifle has about 300 rounds through it.

__________________

Last edited by Bullitt2075; 03-19-2012 at 04:09 PM.
Bullitt2075 is offline  
 
Reply With Quote Quick reply to this message
Old 03-20-2012, 06:08 PM   #5
Bullitt2075
 
Join Date: Nov 2011
Posts: 69
Default

Bump Bump Bump

__________________
Bullitt2075 is offline  
 
Reply With Quote Quick reply to this message
Old 03-21-2012, 02:03 AM   #6
ronmar
Grand Poobah
 
ronmar's Avatar
 
Join Date: Oct 2010
Posts: 1,130
Liked 91 Times on 75 Posts

Default

Well you could send me 2 of them, I can try them in my RFB and see how they perform then send them back to you... I won't be able to do it for 2 weeks or so as my RFB is at KT getting a broken recoil spring tube fixed... If you are interested, PM me...



__________________
ronmar is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Go Back   KTOG - Kel Tec Owners Group Forum > KelTec Products > RFB High Efficiency Rifle

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Thermold magazines T0393 RFB High Efficiency Rifle 86 12-13-2011 12:20 AM
P3AT Feeding Issues rwils53 P-3AT 5 03-13-2008 03:30 PM
PF-9 Feeding Issues fyrfytrcwd PF-9 9 09-04-2007 08:13 PM
SU-16A problem, breaking magazines and not feeding ret_marine2003 SU-16 5 04-18-2007 05:24 PM
10 round feeding issues ddesilva P-32 3 10-10-2004 01:06 AM