I put open sights on an Axis II .243. I did a drill/tap for the rear sight, and that one's fine. However, I soldered a Mauser 98 hooded sight on the front. And after firing a few rounds, the solder loosened and the sight slid off center. I've soldered front sights before, and they didn't come loose. But this is the first stainless steel barrel I've tried.

So the question is: Is there a problem doing this with stainless steel?

Thanks for any replies.