9mm bullets ?

[cemjr]

my first effort at reloading 9mm bullets for practice was; berry's 115grn RN w/4.5 grns of TG @ oal of 1.135 (Berrys own recipe). I would like to change to the 124grn bullet. My question is, what is the difference between the flat nose and the round nose bullet? advantages/disadvantages of one vs the other?

 

[Husker_Fan]

It will depend on your gun. Some feed round nose more reliably. Some will shoot one more accurately than the other. If you're shooting steel plates, the flat nose might do better. It's a good excuse to get some of each and experiment.

I never have though. I just stick with the 115 grn rn because I can mimic the WWB load pretty well, and that's what I buy when I need brass.

 

[Walkalong]

Some guns are finicky about the flat nose. Berrys has a new 124 Gr hollow based round nose that a couple of folks here have tried. It has a long bearing surface and being RN should feed in anything. It would certainly be worth a try.

A quick search here should find some threads on them.

 

[rcmodel]

The main difference is that some guns will not chamber the FP or HP Berry design without seating them very short.

The RN will work at normal OAL in anything.

Reason being that the ogive or nose is shorter on the FP/HP design, and more full diameter bullet shank sticks out of the case and will contact the rifling leade sooner.

Personally, I have givin up on Berry FP and HP bullets in my guns.
I can see no advantage when punching holes in paper or beer cans.

And the RN feed like corn through a goose in everything at normal length.

rc

 

[rfwobbly]

It will depend on your gun.

+1

The barrel-to-bullet fit determines a lot of the loading characteristics. The part of the chamber where the case fits is standardized. The part forward of that is different for every gun maker.

If you like Berry bullets, you can call them and ask Angie or Connie for the "124gr bullet assortment for 9mm". They'll send you a sample pack with 5 or 6 different bullets in it that you can then try.

Like Mr Along said, if you have a "tight-chambered gun" like Springfield XD series or CZ, then you'll love the new 124gr Hollow Base RN especially made for those guns.

To answer your question.... the FP is supposed to be more accurate out past 50 feet. It also punches a cleaner hole in targets. Berry makes 3 types in 124gr....





Hope this helps!

 

[cemjr]

I have two 9mm pistols. 1) Kahr PM9, that you might think would have the most trbl feeding a flat point/hollow point. I've shot factory FMJs @ 1.154oal ,MagTech 115grn JHPs and RN reloads @1.135 with no feeding issues. 2) H&K p-30 that eats everything. What advantage does the RNHB give over the RNFB, a longer ogive?

 

[LiveLife]

If you already have feeding issues with FP bullets that you can't resolve with adjusting OAL, I would recommend the RN bullets.

Based on my experience, hollow base bullets are more accurate than flat base bullets. (If you want to order the HBRN bullets, some are not listed on Berry's website and you need to call and verify their availability).

What advantage does the RNHB give over the RNFB, a longer ogive?

Hollow base bullet's primary advantage comes from the hollow base expanding outward (instead of deforming by compression/obturation of flat base bullet) from high pressure powder ignition gas to form tighter seal with the barrel bore/rifling. This results in less gas leakage around the bullet and more consistent chamber pressures for more accurate shot groups. Secondary advantage is the longer base (bearing surface) that results to better stabilize with the rifling (If you look at the picture below, 124 gr RN is about the same height as the 115 gr HBRN).

I recently did an initial testing of 124 gr HBRN with 115 gr FMJ and HBRN bullets produced more accurate shot groups than my reference load (which has been my standard for 9mm accuracy the past 16 years). From the initial test, 3.8 gr of Bullseye with 124 gr HBRN at 1.135" OAL produced just over 1" shot group at 15 yards off hand. I plan on doing more comparison tests, especially 115 gr head-to-head range tests.

Berry's 124 gr RN, 124 gr HBRN, 115 gr HBRN and Winchester 115 gr FMJ RN:

 

[rfwobbly]

What advantage does the RNHB give over the RNFB, a longer ogive?

No. Same ogive, longer body to give more bearing surface for stability. It's not clear if the hollow actually helps the bullet obturate or not. All I know is that in several independent tests they were more accurate.



L-to-R: 124gr RN, 124gr HBRN, 135gr RN.

 

[cemjr]

thanks you guys for all the good info

 

[rfwobbly]

Don't cheat yourself. That was GREAT info.

 

[cemjr]

I didn't want to sound like I was sucking up

 

[rfwobbly]

You sound like NAFTA.

 

[cemjr]

NAFTA (north American free trade agrement ?)

 

[rfwobbly]

Ross Perot once commented about NAFTA making a large sucking sound.

http://www.youtube.com/watch?v=Rkgx1C_S6ls

 

[GLOOB]

You guys left out one. Berry's also makes a FPHB, at least in 124 grains. This is what I use. In a Glock, you can load these out as far as you want.

 

[Berry's MFG]

Since we've released the new 9mm 124gr HBRN-TP (thick plate) bullet we have had great feedback. As a side note Powder valley just ordered some from us so they should have them available in a week or so.

 

[john16443]

Since we've released the new 9mm 124gr HBRN-TP (thick plate) bullet we have had great feedback. As a side note Powder valley just ordered some from us so they should have them available in a week or so.

Jay, is this 124gr HBRN-TP bullet different than the current one shown on your site?
http://berrysmfg.com/product-i14844-c11-g8-b0-p0-9mm_124gr_HBRN.aspx

 

[Walkalong]

Yep. Looks like they have the 124 Gr HBRN up on the site now. I am going to try some.

 

[1SOW]

You'll really like the way they load. They 'sliiiide' into a barely flared case. They also shoot really well too.