This is a question that Lone Wolf should be able to answer for you as he is an Xcaliber "Guy"...
Break in procedures are pretty similar: shoot one round and clean (x5) Shoot 5 rounds and clean (x5) for hand lapped barrels (which I think the Xcaliber is) that should be all you need for break in. You could go one step further and do a 10 shot string and then clean if you feel the need. I have a CBI (hand lapped) barrel and that was the break in procedure I used.
Lets see what LW says if he comments on this thread though.... He's a competition shooter, so sets a pretty high standard for his gear/setup.
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