Yup, the second day of my Alberta hunt last season I rattled in a MONSTER buck, the first truely mature buck I'd ever seen while bowhunting. He got as close as 19yrds but didn't offer a clear shot. He was a real thick 10pt and probably 300lbs or more. He was a horse. I'll never forget that buck!!
Then on my next to my last day of my hunt I was able to take an OK 8pt that also was a 300lber. I wouldn't call my buck mature though, especially for Alberta.