NMBOpen Posted January 27 Share Posted January 27 Ran out of 147g ibejihead coated flat point bullets. Found some Hornady 115g FMJ RN and loaded them over the same VV N320 charge I used for the 147's. Turns out the lighter bullet wouldn't cycle my Springfield XDm. Seems counter-intuitive. Link to comment Share on other sites More sharing options...
old558 Posted January 27 Share Posted January 27 check the Vitivori reloading data center. Light bullets usually require more powder. Link to comment Share on other sites More sharing options...
NMBOpen Posted January 27 Author Share Posted January 27 Wow. +0.8g. That's +25% at minimum to +21% maximum published for N320 in latest VV app for 9x19mm. Link to comment Share on other sites More sharing options...
shred Posted January 28 Share Posted January 28 Your XDM is "recoil-operated". A lighter bullet with the same powder charge generates a lot less recoil. Otherwise you could go lighter and lighter on bullets until you got to Warp Speed. Link to comment Share on other sites More sharing options...
Farmer Posted January 28 Share Posted January 28 Weight goes down, charge goes up! Link to comment Share on other sites More sharing options...
IVC Posted January 31 Share Posted January 31 Yup, this is standard. Lighter bullet accelerates faster so the peak pressure is lower and the amount of time the pressure generates force on the slide is shorter. Less force and force acting over shorter period of time will make your slide not cycle. Look at any reloading manual and compare loads for different bullet weights, you'll see the pattern. Link to comment Share on other sites More sharing options...
4n2t0 Posted February 1 Share Posted February 1 Very expected results... For future, whenever you change the bullet weight you might want to look at some load data, lol. Link to comment Share on other sites More sharing options...
Racinready300ex Posted February 1 Share Posted February 1 On 1/27/2024 at 6:17 PM, NMBOpen said: Wow. +0.8g. That's +25% at minimum to +21% maximum published for N320 in latest VV app for 9x19mm. You also dropped the bullet weight by 21%, And you increased the case volume considerably too. Link to comment Share on other sites More sharing options...
NMBOpen Posted February 1 Author Share Posted February 1 Much better understanding of the process thanks to the Enosverse. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now