While TooSixy is indeed our resident sight installation SME, if he does not weigh in after a bit, Mildot is a professional armorer for a well known LE agency and the OP can rely on his instructions as well.
Hand fit the sights until you can push them in by hand about 1/3 of the dovetail. You want to take off just a little material at a time, test fit, and repeat.
It doesn't matter which way you drift the sights in, either left to right, or right to left.
If you want to invest in a good sight pusher, get one of the MGW sight pushers. They are expensive but built to last and make your job a walk in the park. Or send them to me.
Free Sight Installation for Members
As a complimentary service to fellow HKProshop members, I can install sights on the following HK pistols. Pistols • USP, USPc, USP45CT • USP Tactical, Expert, Elite, Match • HK45, HK45T, HK45C, HK45CT • P-series (P30/P30S/P30L/P30LS/P30SK/P30SKS/P2000/P2000SK) • VP9, VP40, VP9/40 Tactical, and...www.hkproshop.com
Get a set of fine diamond files, like these on Amazon. That's what I use.
Thanks for the kind words, brother.Like I said, "Resident Sight Installation Subject Matter Expert". Dozens if not hundreds of installs under his belt, over many years. Many of them done FOR FREE, for members of the other site, which repaid him for his generosity and expertise with the back of their hand. He's "The Fifth Beatle" of this one.
Only the truth bro, only the truth.Thanks for the kind words, brother.