SelfPeace Posted September 23, 2019 Share Posted September 23, 2019 Hello, everyone! I was loading 124gr Berry’s plated RN over 4.0 TG to 1.150 for my Shadow 2 and it ran beautifully. I’ve run out and am now using RMR 124gr RN. The profile is a tiny bit different with the RMR and after doing a plunk test, I am having to load to 1.130. Should I necessarily lower my previous powder charge since my new OAL is shorter? Or, would 4.0 still be ok? I did not get to compare the dimensions of the 2 bullet brands. Thank you!!! Link to comment Share on other sites More sharing options...
konkapot Posted September 23, 2019 Share Posted September 23, 2019 I would not change it; shoot it and check brass for signs of overpressure. Link to comment Share on other sites More sharing options...
looking4reloadingdeals Posted September 23, 2019 Share Posted September 23, 2019 Haven’t loaded 124gr plated projectiles in a little while, but 4.0 looks to be at the high end of the load data from Hogdon (4.1 max). I think I had loaded the Berry’s at 1.13-1.14 from 3.6 to 4.0ish with no pressure signs. I have seated bullets about 0.02” deeper with no noticeable change in the load. If you weren’t seeing any pressure signs at all you’re probably safe to send a couple down range and check for pressure. That is totally my opinion though, and it probably wouldn’t hurt to take a little extra time to do a little load development just in case. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Furrly Posted September 23, 2019 Share Posted September 23, 2019 Drop it down to 3.6-3.8 Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted September 23, 2019 Share Posted September 23, 2019 Probably not necessary, but always safer to drop the powder charge and work back up slowly with a chrono. No danger that way Link to comment Share on other sites More sharing options...
SelfPeace Posted September 23, 2019 Author Share Posted September 23, 2019 Thank you, all, for taking the time to respond. Will go lower on the charge and work back up, if needed. I’m just trying to stay above 130 PF. Link to comment Share on other sites More sharing options...
Sandbagger123 Posted September 23, 2019 Share Posted September 23, 2019 i doubt there will be any difference in velocity with that slightly shorter length. almost everyone i know that load TG with a 124 is in the 4.0 to 4.2 area. throwing them over a chrono is the only way to be sure though Link to comment Share on other sites More sharing options...
4n2t0 Posted September 24, 2019 Share Posted September 24, 2019 No appreciable difference, use the same charge. Link to comment Share on other sites More sharing options...
SelfPeace Posted September 24, 2019 Author Share Posted September 24, 2019 Thank you! Link to comment Share on other sites More sharing options...
SelfPeace Posted September 24, 2019 Author Share Posted September 24, 2019 (edited) Btw, other than a flattened primers and damaged casings, what are other over-pressure signs? Edited September 24, 2019 by SelfPeace Link to comment Share on other sites More sharing options...
HesedTech Posted September 24, 2019 Share Posted September 24, 2019 1 hour ago, SelfPeace said: Btw, other than a flattened primers and damaged casings, what are other over-pressure signs? If you are shooting minor, 125-135 PF in 9mm, using the popular powders it is almost impossible to “over pressure” the load. (Note I wrote almost impossible for those naysayers). If you want to load with accuracy then get a chrono and check the velocities of your loads when you make changes. Then when you find the right velocity for the PF you want, tweak it up or down a bit to find the most accurate load for that bullet and gun combo. Basically my answer is, until you push the speeds up near major PF there’s no real need to check for OP, and again that is based on having a chrono to check your loads. Hey you spent hundreds or even thousands on reloading equipment, so for less than $100 one can get a simple and accurate Chrono. Link to comment Share on other sites More sharing options...
Yondering Posted September 24, 2019 Share Posted September 24, 2019 4 hours ago, SelfPeace said: Btw, other than a flattened primers and damaged casings, what are other over-pressure signs? If you see velocity jump up higher and are still using the same powder and charge weight, that's a good indication you've done something to increase pressure. It's definitely worth $100 or so to buy yourself a chrono; with all we spend on loading equipment there's no real reason not to. I would avoid the "Shooting Chrony" brand though, I regretted buying mine. I've been much happier with a Pro Chrono for about the same price, and there is an upside-down Caldwell unit that might be worth checking out. Link to comment Share on other sites More sharing options...
SelfPeace Posted September 25, 2019 Author Share Posted September 25, 2019 Thank you! I just ordered a chrono. Will try out my current load this weekend. Link to comment Share on other sites More sharing options...
George16 Posted September 25, 2019 Share Posted September 25, 2019 (edited) If you decide to buy the Pro chrono, get the Bluetooth adapter so you can download all the data to your phone right away. It makes checking the data easier and more convenient. Just don’t shoot the chrono . Edited September 25, 2019 by George16 Link to comment Share on other sites More sharing options...
mveto Posted September 25, 2019 Share Posted September 25, 2019 When I was using 124gr RMR’s the load you are using is exactly what I used in my SP01 and TS. 1.130 length 4.0gr tightgroup 129-130 pf in my SP01 133-134 of in my TS Link to comment Share on other sites More sharing options...
DougCarden Posted September 27, 2019 Share Posted September 27, 2019 You could just have your chamber reamed so you can load longer. You should be fine but better to be safe. Link to comment Share on other sites More sharing options...
SelfPeace Posted October 13, 2019 Author Share Posted October 13, 2019 Thank you! Please excuse the delay in responding. 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