SM300 and 1171/633 Bracelet Fitment

I have a question about the proper installation of my 1171 bracelet to a . Specifically the end pieces. They are very snug. I am not sure if the end pieces need to be filed down or if it may be the spring bars are causing the tightness. The spring bars seem to be of a good quality, and I am reluctant to put a thinner spring bar on the the lugz. The semi-circular part of the end pieces seem to very tight against the case. The sides of the ends are snug (maybe to snug?).
Any thoughts or input?. I do not want to cause wear marks on the case from poor fitting end pieces.

In the first pic the end piece fits, I think, as it should. Note the small gap at the pointed end of the semi-circle where it it meets the case. In the second pic, a larger gap in the same place. This is how the end piece fits when installed with the bracelet and spring bars. Third pic is the spring bar I am using.

Got it. That should give the spring bar a little breathing room. I think a little filing will be needed too. Thanks for your input.