Concave 115 FMJ

[halfmoonclip]

I've been going with Everglades for my jacketed bullet needs (and they are great to deal with, prompt, and very cost competitive...and all prices includeshipping, tho' of course the prices get better with a larger buy).

Generally, I've been buying the concave base 115 FMJ 9mms; they shoot fine, but I've always wondered what the concave base was about.

Their flat base 9s are getting to the point of being cost competitive with the concave version.

Any ideas, or even good guesses, what the concave bases were for?

Thanks in advance,
Moon

[Uni-Vibe]

I think those are Armscor, made in Phillipines.

I just received 4000 of the flat base 115s, Made in USA.

[halfmoonclip]

That would explain the better price. I may get the flat base next time.
Any idea of the 'why' with the concave ones?
Moon

[gaijin]

Best guess; the concave base helps to obturate, “slug up” and provides a better seal for the bore, which prevents gas “blow by”, helping accuracy.
A .22 has a skirted base for this reason.

[5shank]

I thought I read that the 115 concave bullets were a little under size? Need to order soon and have always used RMR but may try Everglades if the accuracy reviews are good with the 115 gr concave.

[gaijin]

That would make sense; undersize bullet allows blow by, the concave base would act as a “skirt” and help seal the bore.
Have no clue what their reasoning is, if bullets are, in fact, undersize.
Sounds screwy to me.

I use Everglades JHPs in 9mm. They are properly sized and very accurate.
The 124’s I use look like Zero bullets.

[Uni-Vibe]

I was all set to buy hardcast from Missouri Bullets. I rely on them for .357, .44, and 10mm.
But finding9mm FMJ -- real ones, not plated -- from Everglades at the same price, I couldn't turn it down.

You'd be amazed how heavy a medium flat-rate box with 4000 bullets can be.

[5shank]

Maybe someone can mic a couple 115 gr concave bullets to find out what size they are? Price on them is great, just don't want to buy something that you can't get accuracy out of, 25 yds to 50 yds.

[halfmoonclip]

Just put a vernier on some, and they're running 0.355".
Having them obdurate to fill the bore makes a certain sort of sense. I've been driving them with 4.6 Bullseye, and they're clocking 1130'sec. I've been satisfied with the accuracy.
Yeah, 4000 are a hefty package. My mailman is still wanked.
Moon

[5shank]

Ya, know what you mean, made a deal with the mail lady and told her to lay on the horn and I'll help her out. The price is right and if they shoot worth a damn I'd like to stock up a little, You never know what the Dem's will pull on honest Americans!