Sika deer come into elk calls because they are taxonomically in the same genus, which is to say they’re closely related. Sika in real life can be brought in by elk callers and I’ve heard tell of hybrids in the genus Cervus. Also, if you didn’t know, Sika is Japanese for “deer.” They are the deer deer.
I don't know my calibers lol but if you mean the 7600 then I have since it was released. I can't really tell a difference in the rifles so it really doesn't matter to me which I use, I just stick to one after I choose it.