Were you aware that the Xtrema comes with several stock shims to change LOP? If you shouldered one in the store to try it probably had the full-length one installed. Now that it's late-season waterfowl I tried the shorter one in mine to make up for all the extra clothing and it made a big difference (too short for me, in fact). Anyhow, nothing agains the Urika - just passing on the info in case you didn't know.
-DW