UnkleReign
Member
Hello, I have been consuming a lot of info from this forum and finally couldn't find something to answer my question by just searching so the time has come to ask. Appreciate everyone that takes time to help.
Quick summary of the question: I am trying to reach 1100 FPS using RMR 124gr JHP for all my 9mm handguns but also use them with my Shadow 2 which requires a very short OAL (1.050) and gets the bullet seating very close to the powder at 4.1 grains of VV N320. RMR website states "It is recommended that you shoot them at 1100 FPS or more to get reliable expansion for self defense or hunting purposes." In order for me to reach a higher FPS I will have to increase powder charge to 4.2 or more (especially for my Glock 19) and the bullet looks very close to the powder. Is it safe to do so without looking into other powder/load data recipes or creating separate loads?
I have been regularly loading 124gr RN FMJ with 9mm at the shortest length determined by my Shadow 2 and use that OAL of 1.110-1.120 with 4.2grs of N320 for all my 9mm handguns to make life a bit easier when loading, they work great. Recently, I wanted to try loading RMR 124gr JHP MPR in the same manner but also use as defensive rounds if needed. These however require an OAL of 1.050 to pass plunk on my Shadow 2. So far I have worked up a similar JHP load from 3.9grs to 4.1grs of N320 and get an average of 1085 FPS in 50 degree weather. (I mention weather since I read warmer temperature will increase velocity and in SoCal is doesn't get much cooler, most of the year it's 60-80 degrees. So, if true, 1085FPS is on the lower end) Problem is my Glock 19 has an average of 1066FPS which will require even more powder to reach 1100FPS at that OAL.
I probably won't be shooting them through my Shadow 2 as defensive round since that's not my first choice for home/self defense so the current PF is fine for that specific firearm but I'd like to have the option for my Glock 19 or other 9mm handguns. I would prefer to use one single load per bullet for all my 9mm handguns.
Another option which I want to avoid at the moment is to just make separate batches for the Shadow 2 and my other 9mm handguns since my other 9mm barrels will accept a longer OAL. It will allow me to increase the charge without worrying about setback or issues with the bullet sitting so close to the powder. Or maybe I'm making this a bigger deal than it is and it's safe to increase powder charge and continue to loading the same OAL of 1.050 with 4.2/4.3grs of powder?
A max load for a couple different 124Gr bullets with a 1.142 OAL is 4.3grs in the load data I have for VV N320. So to go this short 1.050 with a 124 JHP and also increase powder charge near max is a bit worrying (main reason I wanted to ask first before even attempting a higher powder charge).
I'd like to stick to the N320 as well since I got a great deal locally a while back and have enough for another 6-8 months.
Data from shooting the RMR 124gr JHP in both guns.
Name: Shadow 2 - (124gr JHP 4.1gr 1.050)
Shots: 5
Average: 1085 ft/s
SD: 6 ft/s
Min: 1077 ft/s
Max: 1093 ft/s
Spread: 16 ft/s
Power Factor Average: 134
Power Factor Low: 133
Power Factor High: 135
Barometric Pressure: 29.9 in Hg
Temperature: 50F
Weight: 124 gr.
Manufacturer: RMR
Type: JHP MPR FMJ
Caliber: .355
Powder: 4.1gr N320
Firearm: Shadow 2
Name: Glock 19 (124gr JHP 4.1gr 1.050)
Shots: 5
Average: 1066 ft/s
SD: 5 ft/s
Min: 1063 ft/s
Max: 1076 ft/s
Spread: 13 ft/s
Power Factor Average: 132
Power Factor Low: 131
Power Factor High: 133
Barometric Pressure: 29.9 in Hg
Temperature: 50F
Weight: 124 gr.
Manufacturer: RMR
Type: JHP MPR FMJ
Caliber: .355
Powder: 4.1gr N320
Firearm: Glock 19
Quick summary of the question: I am trying to reach 1100 FPS using RMR 124gr JHP for all my 9mm handguns but also use them with my Shadow 2 which requires a very short OAL (1.050) and gets the bullet seating very close to the powder at 4.1 grains of VV N320. RMR website states "It is recommended that you shoot them at 1100 FPS or more to get reliable expansion for self defense or hunting purposes." In order for me to reach a higher FPS I will have to increase powder charge to 4.2 or more (especially for my Glock 19) and the bullet looks very close to the powder. Is it safe to do so without looking into other powder/load data recipes or creating separate loads?
I have been regularly loading 124gr RN FMJ with 9mm at the shortest length determined by my Shadow 2 and use that OAL of 1.110-1.120 with 4.2grs of N320 for all my 9mm handguns to make life a bit easier when loading, they work great. Recently, I wanted to try loading RMR 124gr JHP MPR in the same manner but also use as defensive rounds if needed. These however require an OAL of 1.050 to pass plunk on my Shadow 2. So far I have worked up a similar JHP load from 3.9grs to 4.1grs of N320 and get an average of 1085 FPS in 50 degree weather. (I mention weather since I read warmer temperature will increase velocity and in SoCal is doesn't get much cooler, most of the year it's 60-80 degrees. So, if true, 1085FPS is on the lower end) Problem is my Glock 19 has an average of 1066FPS which will require even more powder to reach 1100FPS at that OAL.
I probably won't be shooting them through my Shadow 2 as defensive round since that's not my first choice for home/self defense so the current PF is fine for that specific firearm but I'd like to have the option for my Glock 19 or other 9mm handguns. I would prefer to use one single load per bullet for all my 9mm handguns.
Another option which I want to avoid at the moment is to just make separate batches for the Shadow 2 and my other 9mm handguns since my other 9mm barrels will accept a longer OAL. It will allow me to increase the charge without worrying about setback or issues with the bullet sitting so close to the powder. Or maybe I'm making this a bigger deal than it is and it's safe to increase powder charge and continue to loading the same OAL of 1.050 with 4.2/4.3grs of powder?
A max load for a couple different 124Gr bullets with a 1.142 OAL is 4.3grs in the load data I have for VV N320. So to go this short 1.050 with a 124 JHP and also increase powder charge near max is a bit worrying (main reason I wanted to ask first before even attempting a higher powder charge).
I'd like to stick to the N320 as well since I got a great deal locally a while back and have enough for another 6-8 months.
Data from shooting the RMR 124gr JHP in both guns.
Name: Shadow 2 - (124gr JHP 4.1gr 1.050)
Shots: 5
Average: 1085 ft/s
SD: 6 ft/s
Min: 1077 ft/s
Max: 1093 ft/s
Spread: 16 ft/s
Power Factor Average: 134
Power Factor Low: 133
Power Factor High: 135
Barometric Pressure: 29.9 in Hg
Temperature: 50F
Weight: 124 gr.
Manufacturer: RMR
Type: JHP MPR FMJ
Caliber: .355
Powder: 4.1gr N320
Firearm: Shadow 2
Name: Glock 19 (124gr JHP 4.1gr 1.050)
Shots: 5
Average: 1066 ft/s
SD: 5 ft/s
Min: 1063 ft/s
Max: 1076 ft/s
Spread: 13 ft/s
Power Factor Average: 132
Power Factor Low: 131
Power Factor High: 133
Barometric Pressure: 29.9 in Hg
Temperature: 50F
Weight: 124 gr.
Manufacturer: RMR
Type: JHP MPR FMJ
Caliber: .355
Powder: 4.1gr N320
Firearm: Glock 19
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