I say get the ammo you are confident in, like mentioned above, it doesn’t go bad... you’ll have it.You're going on vacation in WY/MT for a week. Doing an overnighter in the Wind Rivers then heading up to MT to camp/fish the rest of the time. Maybe going through Glacier. You're from Pennsylvania where black bears are the biggest thing in the woods.
So you own a Glock 20 and carry Sig 180gr FMJs in it when you're in the woods normally and hollow points around town.
Would you rather spend $50 on 40 rounds of Underwood hard cast for your week out west? Or just call it good with the Sig FMJs that you have and save your money.
Oh and btw money is fairly tight (you can afford the ammo but your gf might get ticked off) and you also have bear spray you plan on taking.
What would you do if you were me?
that being said, what are the odds of the 180’s not being effective but the underwood being effective? I say it’s VERY unlikely! I prefer the same setup as 5milesback, alternate hard cast and xtp... I have not stopped a charging grizz, so I won’t say my setup is effective... hopefully I never find out.
I would get the Underwood, it’s good to keep your GF on her toes if nothing else, but in real world practical applications, your 180’s are probably fine, it will come down to reaction time and shooting well under pressure rather than the actual projectile