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Do bullet weights actually matter....when "qualifying" a gun to be carried?

By qualifying I mean, has it gone through enough range testing of my specific self defense carry ammo that I would feel comfortable carrying it. I'm not really concerned with FMJ.

My base numbers for qualifying is 600 rounds of FMJ (don't care about bullet weights), and 200 rounds of the actual self defense ammo that I am going to use. I want to make sure that my new 9mm can cycle my carry ammo reliably, but I fear I might be taking things too far.

I purchased a smaller, more compact 9mm pistol back in January to replace my larger service pistol that I was getting by with.

My EDC round that I decided upon was the Federal Premium HST 9mm, so I went to the store and picked up 4 boxes of 20 rounds of the 150 grain 9mm HST, but never shot them. Later, I stumbled across the law enforcement HST +P 9mm round in 124 grain and was happy with the ballistics gelatin tests and expansion numbers, so I bought two boxes of 50 rounds. My 9mm cycled the 100 +P rounds with no issues.

Unfortunately, the site does not have the exact same grain (124 grain HST +P) that I previously purchased and started qualifying with. They do however have the larger 147 grain HST +P) in stock.

Am I being too crazy about this? Does it really matter if they are from the same manufacturer, same load (I assume), just different bullet weights? If I fire the 147 grain HST +P, should I call it good and carry on?