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Now get a proper set of roll pin punches that won't bugger the roll pins as you tap them into place.
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TIS!
The correct roll pin punches for slotted pins have a small hemisphere on the tip to fit inside the roll pin and keep them centered.
The punch for rolled up style pins have a shallow cylindrical recess with a flat bottom (NOT a round bottom recess) and are used to driven the pin most of the way, but not fully.
A carefully applied drive pin punch will do the last tiny bit.
Cheap punches may also be softer than the pin and deform, so choose carefully.
Roll pins are hardened springs, and are also brittle.
The slotted ones are usually easier to work than the rolled up style.