Rifle with Swappable Barrels
- Thread starter cactusjack
- Start date
Help Support Long Range Hunting Forum
Ehhhh I don't know about that
Bill,
Sorry i must have missed that. My thinking tells me the set screws are more of a precaution like most all set screws in any application serve.
If you use a torque wrench then you can be consistent. If you hand tighten it won't be consistent and may possibly loosen up
If you want consistent results then set the gun up consistently. If you are consistent when putting a barrel in the headspace changes
Lees right. You have to have something else to hold it. You would always be tightening it and having issues with the headspace and that can lead to case head separations.
Tenon length is the same .725". The only differences is with the QC your go gauge protrusion is .002" longer because of no torque. If you are going to torque a barrel on a QC then it needs to be chambered then you cut the chamber to have 0.002" shorter headspace. The other difference is the .200" flat cut for the screws to mate to.
Maybe @Joel Russo will chime in to confirm.
mullmann03
Well-Known Member
Maybe @Joel Russo can chime in on the purpose of the set screws. Are they there to hold the barrel or as a precaution on the QC?
They are not a precaution. They are to hold the barrel in place. Everything is engineered for a purpose. And I for one would not want to gamble with the barrel being slightly loose. Slightly loose on a shot may not sound like a lot but in the world of rifle chambers is a lot. Terminus actions are very very very consistent in measurements. I have not had one yet that was any different that what they are stated to be. Now I can name 3 actions that come to mind that every one measures slightly different and they are suppose to be manufactured to have headspace tolerance to a 0.001", but that's not the case. Terminus are dead nuts from I have found.
Last edited:
mullmann03
Well-Known Member
I agree 100%. In post 72 I was told I was wrong so I figured the manufacturer could enlighten us.
Joel Russo
Well-Known Member
The Zeus QC is available in both long and short action configurations.
The tenon is the same length for both the QC and FT, but the thread length is different. Check the tenon prints on the website.
All Terminus actions have guaranteed headspace. When you marry them up with a shouldered pre fit barrel from an endorsed supplier, the headspace will not change when you hand torque the barrel and torque the set screws as per our recommended method.
There's plenty of info on the interweb, and YouTube on the reliability and repeatability of the Terminus Zeus QC.
Last edited:
You can do it for sure. For half the cost I don't think so. But your gunsmith will have to have the action measurements to cut a barrel and if you're not capable of recording the measurements then your gs will have to have your action every time and I would venture to say most all gunsmiths will want your 700 action to cut a chamber for liability purposes in setting the headspace correctly.
Joel,
My mistake on the tenon length. Not sure where I got that idea.
Any reason that you don't make the QC for your lighter actoins?
Thanks,
Bill
