9mm hollow points

[kalielkslayer]

Welcome to THR.

Keep in mind that many 9mm bullets (lead, coated lead, plated, jacketed) can vary in weight from .5 gr to 1+ gr average so I interchanged load data for 124/125 bullet when referencing load data for my load development.

But if you insistt on using load data for 125 gr, go to - https://www.hodgdonreloading.com/reloading-data-center

Here are some examples using W231/HP-38 and ZIP, two comparable powders (NOTE: HAP for match shooting is same bullet as XTP without the expansion cuts ... Also note the linear progression of W231/HP-38 velocity related to powder charge between 124/125 load data):

• 9mm 125 gr Hornady HAP W231/HP-38 OAL 1.069" Start 2.8 gr (753 fps) - Max 3.3 gr (876 fps)
• 9mm 125 gr Sierra JHP ZIP OAL 1.035" Start 3.4 gr (886 fps) - Max 3.8 gr (970 fps)

And 124 gr load data for comparison:

• 9mm 124 gr Hornady XTP W231/HP-38 OAL 1.060" Start 3.7 gr (957 fps) - Max 4.2 gr (1,050 fps)
• 9mm 124 gr Hornady XTP ZIP OAL 1.060" Start 3.3 gr (888 fps) - Max 3.7 gr (967 fps)

And we are starting to see RMR specific load data.

• 9mm 124 gr RMR JHP Accurate No. 5 OAL 1.120" Start 5.5 gr (989 fps) - Max 6.1 gr (1,076 fps)
• 9mm 124 gr RMR JHP Ramshot True Blue OAL 1.120" Start 5.0 gr (992 fps) - Max 5.6 gr (1,084 fps)

The 125 grain HAP bullets I bought were .356. All the others are .355. That spooked me when I first started reloading 9mm. I loaded a few, took em outside and shot them. Most accurate load ever out of my Glock. But they seemed “different.” And since they were .001 bigger, I taped the bag up and put them away.

I’ll get back to them someday.

 

[BJung]

I suggest using load data based on the weight of the bullet. Given the load data being used, use the oal provided for your first set of test loads and upon finding the most accurate load, adjust your seating depth to find the most accurate OAL for that charge. I've seated my bullets to where they barely could fit in the magazine and the slide would lock. I then did an accuracy test with various loads. For a third test, you can try different cases. Brass manufacturers stamp out brass of slightly different wall thicknesses that will then create different neck tension. Be sure to slug your barrel. You are not shooting lead bullets (yet) but 9mm barrel caliber dimensions vary and it's important to know what bullet size is best for your barrel.

 

[LiveLife]

The 125 grain HAP bullets I bought were .356. All the others are .355. That spooked me when I first started reloading 9mm

9mm bullets can come sized from .354", .355" (Most common), .3555" (Speer TMJ/Gold Dot and RMR in-house jacketed that's used for ELEY match ammunition), .356" (Berry's MFG, Zero, Hornady HAP, most lead/coated lead bullets) - https://www.thehighroad.org/index.p...re-sized-the-same.818806/page-2#post-10567453

Here's 9mm Hornady HAP sized .354" (Also come in .355"/.356" sizing) - https://www.midwayusa.com/product/1022920049/

Brass manufacturers stamp out brass of slightly different wall thicknesses ... and it's important to know what bullet size is best for your barrel.

This is true.

If you experience significant bullet setback issue, you can consider using larger sized bullets and/or thicker case wall brass - https://www.thehighroad.org/index.p...neck-tension-and-bullet-setback.830072/page-4