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Defiance does it again! Tube gun perfection!

strictlyRUM

Sergeant
Full Member
Minuteman
Mar 24, 2006
351
7
49
Redmond Oregon
I posted this here as well as the gunsmithing section so the guys that dont get to both can see this. Its worth it.


Well Glen did it again! I told him what I want and he made it happen. Again I am assured that the boys at Defiance are some of the nicest and most tallented guys in the industry.

Before I get into details I would like to thank all the guys that have been patient while I deal with personal and health issues. The guys here on the hide are a better breed than most. I havent been the easiest guy to get ahold of and have been taking longer getting things done than I would care to. Fact is I am blessed being able to take a step back and deal with these things. Thanks to all.

Enough of that on to the important stuff..... I told glen that I wanted an action that I could shoot any thing from 308 class to lapua class. I like the idea of the tube actions that he worked on for the short chasis. One thing I didnt care for was the extremely long thread engagement length. I wanted more meat around the chamber area for the lapua and variants. I originally asked for him to shorten the front down. I also wanted the magazine port to be long enough to accept the extended magazines. IE the wyatts drop mag or seekins mag. He replied. "I got just the combo that will work. I think. This action doesnt have no flies on it!"
So away he went and came up with a combination of different actions, that resulted in one bad ass action. A platform for multi callibers that gives nothing up anywhere. He stretched the bolt around half in so that we can have a bigger mag port and ALOT more metal in the lugs. This will greatly reduce any brass stretch/deflection in the action from the much larger lug abutment. It also shortened the thread engagement down to a still very long 1.100. I tried to show everything in the pics because I am not sure of my wording or my abillity to explain things in a way that most would understand.

With the greater distance in the front. (chamber to magazine release point) I was unsure of the feeding of the smaller rounds like the 308. Well I havent built the bottom metal for the longer mags yet but with the short bottom metal that came with the tube stock, it fed 308 in the current barrel and even 223 into a barrel stub I fitted up. The 223 worked in my setup but I could see where it may be finicky if not setup exactly right. With the bolt diameter of .750 not .700 I did have to shorten the mag catch by .030 to get reliable feeding. Anyone that has the RTM would be able to do that with standard sander or dremel or whatever. I truely believe this is a great platform for the precision shooter. It may look like an irrigation pipe but it feals like an extension of me. I plan on shooting everything to high power/ prone matches to hunting elk in the high country with an ABS 338 barrel I have coming in the next couple weeks. With the addition of the CIP mag bottom metal that Gary plans on doing soon it makes this a very versitile platform.

As with anything there are things I like and things I dont like. Or would change rather. I will post some of the things I will be changing in the future given things calm down and I can spend some time out here. Mainly lightening and making parts that may a bit more resistant to the abuse of some of you guys!(you know who you are!) Anywho here are the pics. I got to get busy while I can. Thanks

Jason

I have left alot out but you can get specs on the tube stock from Competition shooting stuff. Gary Elisio is a great guy to deal with and fast service. The action is Glen Harrisons baby from Defiance. You can order directly from him or any one of us that have our actions built by them. Thanks again Glen for pushing our sport and lifestyle further forward!

A pic of the monster action compared to a normal long action remmy
tubegun004.jpg


Monster bolt compared to normal notice .750 diameter and added length of lugs and bolt body
tubegun005.jpg


A pic showing built in recoil lug
tubegun003.jpg


Assembled
tubegun002.jpg


tubegun001.jpg


Changeable bolt stop for different bottom metal changes(lengths)
tubegun007.jpg
 
Re: Defiance does it again! Tube gun perfection!

Well she shoots! I just threw some varget/sceenar loads together. I went pretty safe with it being a bartlein tight bore barrel. 46.0 grains and it was 2780 avg over six shots. Both groups were around .3. After getting my zero I tried some load testing. All groups were under .8(typical 308) but at 47.0 grains I am still only getting 2870 avg. From what I have read I should be around the high side of 2900. These are lapua palma(small primer) brass so I am not sure if that has anything to do with it but I will try a bit stiffer load.

Jason