Do you do anything special to break in your pistol? Clean the storage grease off of it, lube it, and shoot it pretty much?
A gentleman told me to run an oil patch down the barrel after every mag for 250 rounds and stressed that I not break the gun in with hollow points.
Was that guy a gun store guru?
Breaking in a rifle and a pistol are two different things. With a rifle the idea is to lay down a "foundation" in the barrel so as to fill in any microscopic imperfections and make the bore smoother. But it's not nearly as important today I guess, many mfg. say it's not necessary but Lilja recommends a 100rd. break in and for $500 custom barrels, what's 100rds. with a little cleaning in between the first time out?
But with a pistol it has to do with ramming 500-1000 rounds of whatever you plan on carrying in it, HP's or not, through all the mags in various holds, some mag dumps, etc., to see what, if anything, will jam it up, if all the mags are good, and the use will also wear down any new surfaces enough so as to make it a little smoother, more reliable. The pistol also has a chance to break you in, ie, the sights, draw, what works and what doesn't.
If it's a Glock, they do recommend to wipe down the anti-seize (that copper looking paste) and lube up those areas and the ones the book shows prior to use. That's it. Maybe an oily patch down the barrel then a dry one. Then it'll get cleaned when I'm done "breaking it in".
Good luck, and stay away from those gun shop gurus.