Because if there is any chance that this blue loctite will become liquefied and run back into the receiver area I think that I might pass on using Loctite. But I still like the idea of using the tool to square up the face of the receiver and filling in the gap (if necessary) between the outside of the extension and inside of the receiver. These two ideas seem like they are relatively cheap and easy to help,or possibly solve accuracy problems. Or inaccuracy? (IMO)
Accuracy fixed.
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Originally posted by LWP View PostSo now I'm curious, what temp does the barrel extension and chamber heat up to with an ambient temp of 95* shooting 10 shots at lets say in 20 seconds produce? Or, how many shots can be fired before the temp gets high enough to start to melt the blue loctite?
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There have literally been hundreds of loctited barrel extensions deployed, and I've yet to read where someone had an incident of blue incursion into the receiver. Here's something else for you to ponder: At 140F, it becomes too uncomfortable to hold your hand to the barrel. It is at or before this point where I've always set my rifles aside to cool while I gave another a turn on the bench. This is also the practice literally all my shooting partners follow and when they set theirs aside, as well.Last edited by NugginFutz; 07-16-2017, 06:40 PM.If it's true that we are here to help others, then what exactly are the others here for?
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Originally posted by LWP View PostBecause if there is any chance that this blue loctite will become liquefied and run back into the receiver area I think that I might pass on using Loctite. But I still like the idea of using the tool to square up the face of the receiver and filling in the gap (if necessary) between the outside of the extension and inside of the receiver. These two ideas seem like they are relatively cheap and easy to help,or possibly solve accuracy problems. Or inaccuracy? (IMO)
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Ok so for all intentional purposes Blue Loctite will liquefy at around 450 deg F. Given that number I plan on taking my MiniTemp laser gun with me to the range next time to do some testing on the temp of my different rifle barrels next to the receivers after firing some shots. Not only in different calibers but with some different powders, since I think that the difference in powders is a factor also. Maybe not that much but I'm still curious to see. Also because of the hand guard on my gas guns I'm not really able to feel the temp like I can on my bolt guns. We'll see what happens. I'm hoping after firing 20 shots with my 6.5 Grendel in around 30 - 40sec. that I'm nowhere near 450* F.
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I imagine glue will get soft as the breech heats up but as long as it is contained in the join it should (like water) be essentially incompressible. If incompressible then it is still should be providing support. Unlike grease, which is always viscous and so there's more opportunity for it to migrate out the tiny cracks and joins when hot or cold, when in use or being stored. I do notice when pulling off old barrels that there always seems to be less grease than when they first went on.
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So this means that the Loctite is constantly changing form? I'm not a big fan of change, when something is constantly changing there is no consistency. And when there is no consistency things are not repeatable. I like my weapons and ammo to be repeatable for constant dependability.
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Originally posted by LWP View PostSo this means that the Loctite is constantly changing form? I'm not a big fan of change, when something is constantly changing there is no consistency. And when there is no consistency things are not repeatable. I like my weapons and ammo to be repeatable for constant dependability.
What I am more interested in is the difference in precision between guns originally assembled with MILSPEC grease and then disassembled, cleaned and bedded with glue. There's not much that you can say with guns assembled from scratch with glue. It's all about the relative difference between glue and grease, all other things being equal.
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Just thought I'd throw this in, purchased one of these yesterday. Updated my 20 something year old range finder. http://www.brownells.com/optics-moun...rod107245.aspx Just encase anybody was looking for one at a great price.
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I just lap and forego the loktite. Never really had any issues after lapping. I use Aeroshell grease on the barrel nut threads and torque the barrel nut tightening, looseing, tightening until I get my spec.""Come taste my Shillelagh you goat-eatin bastard!""
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I think the annealing temp on 7075 (and 6061) is well above 450-degrees. The extension gets "warm" so measuring it would seem like good data to have. x2 on Klem's last post...as long as it sticks around (pun intended) in whatever form it's probably doing something.
I'm curious now...next time we get one of the brothers FA dealer samples out and dump a few Magpul 60's through it I'll infared a couple places and post back.
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