I've just received some 124gn plated hollow points from RMR and I'm looking for some data to start with. I looked on the hodgdon site and all they have for 124gn 9mm is BERB HBRN TP. RMR says they have a thick plate on theirs and you should use FMJ data so I think the TP data will be comparable but I'm not sure about the HBRN profile. What do you guys think, are they close enough to use the data?
124gn plated Hp 9mm
- Thread starter EVO
- Start date
- Status
7mmb
Member
I would compare jacketed data from a few sources and start from there. Hodgdon's data tends to be a little lower than other sources like Sierra and Speer so using that data should be perfectly safe. The tricky part will be coming up with a COAL. Your seating depth needs to be the same as the bullets used with the data you are using.
Boho
Member
Round nose COL is usually longer than hollow points. I haven't used RMR hollow points before but have used Speer and Hornady. I load my 124 gr RN at 1.135 and my hollow points in a range from 1.110 to 1.115 depending on the bullet and load data.
gamestalker
member
I would think you should be just fine if you work up from starting jacketed data, Hodgdon is fine. For TP bullets, using jacketed start charges is perfectly fine.
As for oal, plunk test those, make sure they fit the magazine as well. Then, providing they pass set back bench test, just start with that max oal, and then go shoot some to see how they perform. I would manually cycle some to see if the oal seems ok at that level, though live fire is the best test.
GS
As for oal, plunk test those, make sure they fit the magazine as well. Then, providing they pass set back bench test, just start with that max oal, and then go shoot some to see how they perform. I would manually cycle some to see if the oal seems ok at that level, though live fire is the best test.
GS
I wouldn't use the hollow base TP data. The hollow base gives more capacity. Use a bullet with a common shape.
I run that bullet at 1050ish FPS in 5" guns. Works great. I use 3.9 Grs of powder. The closest data I found (Vihtavuori PDF) was for a Rainer RN (At a longer OAL, due to the RN vs HP) and the max was 4.1 Grs of that powder.
I load it at 1.060 OAL. A bit short IMO, but it works in my guns.
Use 124/5 Gr jacketed data, stop at 75% and you'll be fine, but you can sneak up on 90% of max and probably be OK, assuming the powder is not a real fast one.
Start low, work up, and be careful. Any medium speed powder should be able to push them to 1050/1100 FPS and be safe. I am using one a bit faster than that, but not real fast.
I run that bullet at 1050ish FPS in 5" guns. Works great. I use 3.9 Grs of powder. The closest data I found (Vihtavuori PDF) was for a Rainer RN (At a longer OAL, due to the RN vs HP) and the max was 4.1 Grs of that powder.
I load it at 1.060 OAL. A bit short IMO, but it works in my guns.
Use 124/5 Gr jacketed data, stop at 75% and you'll be fine, but you can sneak up on 90% of max and probably be OK, assuming the powder is not a real fast one.
Start low, work up, and be careful. Any medium speed powder should be able to push them to 1050/1100 FPS and be safe. I am using one a bit faster than that, but not real fast.
I bet they have a big difference in OAL, and that they are seated pretty close to the same depth, which is what affects pressure.
I log all my bullets lengths (and diameters), as well as the OAL of the round. This way I can figure out how deep one is seated compared to another.
I log all my bullets lengths (and diameters), as well as the OAL of the round. This way I can figure out how deep one is seated compared to another.
1SOW
Member
Walkalong +1!
The new Hogdon sight has all the load data it ever did Plus the new CFE powder.
Don't just look at 124gr. Look at "ALL, 124, 125 "ALL" powders and then pick out the closest applicable for your use.
You used to be able to just look down the list, now you have "open" every list and scroll down the page. :-(
For that bullet, any same jacketted/plated 124/125 weight and "general nose shape" is safe to start at the "LOW END of THE LOAD DATA": JHP, JFP, Hornady, Speer etc etc.
The new Hogdon sight has all the load data it ever did Plus the new CFE powder.
Don't just look at 124gr. Look at "ALL, 124, 125 "ALL" powders and then pick out the closest applicable for your use.
You used to be able to just look down the list, now you have "open" every list and scroll down the page. :-(
For that bullet, any same jacketted/plated 124/125 weight and "general nose shape" is safe to start at the "LOW END of THE LOAD DATA": JHP, JFP, Hornady, Speer etc etc.
LV Gun
Member
I use plated bullets from Berrys and use there recommendations for velocity contact RMR they should be able to help you.
I tried a few different loads and this was probably my best group (I'm not a great shot yet). It's 18 degrees outside with 5mph wind so my phone says it feels like 11. The load was RMR plated 124gn HP, Win case, cci primer, 4.2gn of Win 231 with OAL of 1.080. I used a Taurus PT92 from 15yds on this target but also tested it with my XDsc and worked well in that too.
[/URL]
[/URL]
Last edited:
- Status
