Recently got some XS sights for my Marlin 1895, 45-70. Very excited to get them on, however, it would appear that the factory assembled the front sight to the barrel with red loctite as I can not get it to budge. Did a little research and figured I'd take a torch to it to try to loosen the loctite up, but after getting it and the surrounding area of the barrel fairly hot (what I would say is 550 degrees) I still cannot budge the screw.
I'm thinking maybe it didn't get it hot enough for long enough, but I wanted to make sure I wasn't going to damage the barrel if I did so. Tried doing research on heating gun barrels and the tempering and so forth, but couldn't find much on exactly how far to push the heat.
I do some knife making so I recognize annealing discoloration and so forth. It looks like a small portion of the barrel may have discolored to a purplish blue. How hot can I take it without causing damage? Have I done any damage already?
Any other ideas for getting this damn screw out?
Thanks.
I'm thinking maybe it didn't get it hot enough for long enough, but I wanted to make sure I wasn't going to damage the barrel if I did so. Tried doing research on heating gun barrels and the tempering and so forth, but couldn't find much on exactly how far to push the heat.
I do some knife making so I recognize annealing discoloration and so forth. It looks like a small portion of the barrel may have discolored to a purplish blue. How hot can I take it without causing damage? Have I done any damage already?
Any other ideas for getting this damn screw out?
Thanks.