Aforum55 Posted August 13, 2019 Share Posted August 13, 2019 (edited) Been running RN bullets with an OAL at 1.15 in my 9 major open pistol. Tried some HP Precision Delta and the nose Dive in the magazine hen filled with 29 rounds. Thoughts? Edited August 13, 2019 by Aforum55 Link to comment Share on other sites More sharing options...
Guy Neill Posted August 13, 2019 Share Posted August 13, 2019 New mag springs, perhaps? What OAL are you using with the HP? Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted August 13, 2019 Share Posted August 13, 2019 If the RN 1.15's are still running, probably not the springs, but they're cheap - why not replace them? As Guy mentioned, I'd suspect the OAL - have you run The Plunk Test on the new bullets ? Link to comment Share on other sites More sharing options...
blackfatbob Posted August 13, 2019 Share Posted August 13, 2019 (edited) 10 hours ago, Aforum55 said: Been running RN bullets with an OAL at 1.15 in my 9 major open pistol. Tried some HP Precision Delta and the nose Dive in the magazine hen filled with 29 rounds. Thoughts? Looking at the HP Precision Delta's, they appear to be conical. So they likely have a narrower shoulder and are hitting the feed ramp further up the bullet. Hold the two load up with the HP in front of the RN. I bet you can see the RN from behind the HP. If you can tolerate a longer OAL, that might help. Or..... Have you tried RMR's HPs. Very popular around here. Edited August 13, 2019 by blackfatbob hitting further up the bulleet Link to comment Share on other sites More sharing options...
Aforum55 Posted August 13, 2019 Author Share Posted August 13, 2019 25 minutes ago, Hi-Power Jack said: If the RN 1.15's are still running, probably not the springs, but they're cheap - why not replace them? As Guy mentioned, I'd suspect the OAL - have you run The Plunk Test on the new bullets ? Springs are brand new! I can't even get them out of the magazine, "Plunk test" isn't relevant at this point. Link to comment Share on other sites More sharing options...
Aforum55 Posted August 13, 2019 Author Share Posted August 13, 2019 8 minutes ago, blackfatbob said: Looking at the HP Precision Delta's, they appear to be conical. So they likely have a narrower shoulder and are hitting the feed ramp further down the bullet. Hold the two load up with the HP in front of the RN. I bet you can see the RN from behind the HP. If you can tolerate a longer OAL, that might help. Or..... Have you tried RMR's HPs. Very popular around here. That's what I'll try next. I'm currently running the HP Deltas at 1.15. weird part is they load fine if the mags are down loaded a few rounds. If I fill em up they're nose diving in mag. Just had all feed lips tuned etc. Link to comment Share on other sites More sharing options...
blackfatbob Posted August 13, 2019 Share Posted August 13, 2019 (edited) 2 minutes ago, Aforum55 said: That's what I'll try next. I'm currently running the HP Deltas at 1.15. weird part is they load fine if the mags are down loaded a few rounds. If I fill em up they're nose diving in mag. Just had all feed lips tuned etc. Nose diving b/c the front of the round is not supported as well by the feed ramp would be my bet. Especially when the mag is completely topped up causing drag at the feed lips. I stay away from conicals in all my 1911/2011 patterns. Good Luck Edited August 13, 2019 by blackfatbob Link to comment Share on other sites More sharing options...
igofast85 Posted August 13, 2019 Share Posted August 13, 2019 Have you measured the magazine feedlips to confirm they are in spec?Sent from my SM-G920V using Tapatalk Link to comment Share on other sites More sharing options...
Aforum55 Posted August 13, 2019 Author Share Posted August 13, 2019 36 minutes ago, igofast85 said: Have you measured the magazine feedlips to confirm they are in spec? Sent from my SM-G920V using Tapatalk Yes, they were all just tuned. Grams springs and followers just put in. 59 minutes ago, blackfatbob said: Looking at the HP Precision Delta's, they appear to be conical. So they likely have a narrower shoulder and are hitting the feed ramp further down the bullet. Hold the two load up with the HP in front of the RN. I bet you can see the RN from behind the HP. If you can tolerate a longer OAL, that might help. Or..... Have you tried RMR's HPs. Very popular around here. That's what I'll try next. I'm currently running the HP Deltas at 1.15. weird part is they load fine if the mags are down loaded a few rounds. If I fill em up they're nose diving in mag. Just had all feed lips tuned etc. Link to comment Share on other sites More sharing options...
Furrly Posted August 13, 2019 Share Posted August 13, 2019 down load to 28, try it then Link to comment Share on other sites More sharing options...
kitestir Posted August 13, 2019 Share Posted August 13, 2019 What mags are you using? I have the new style sti mags and have the same issue using HP’s. If I use Montana Gold CMJ’s they run 100%. Mags have been tuned and have done it since day 1. Link to comment Share on other sites More sharing options...
NoSteel Posted August 13, 2019 Share Posted August 13, 2019 Mags with or without spacer plate?? In mags I have spacers PD HP’s run fine with Grams followers but stock followers won’t run unless downloaded 1 due to being too tight.. All I run is grams in my STI mags now that have spacer Link to comment Share on other sites More sharing options...
Aforum55 Posted August 15, 2019 Author Share Posted August 15, 2019 All is good now. Switched back to RN and she's running fine! Guess it didn't like the bullet profile On 8/13/2019 at 8:29 AM, igofast85 said: Have you measured the magazine feedlips to confirm they are in spec? Sent from my SM-G920V using Tapatalk Yes, they were all just tuned. Grams springs and followers just put in. On 8/13/2019 at 8:06 AM, blackfatbob said: Looking at the HP Precision Delta's, they appear to be conical. So they likely have a narrower shoulder and are hitting the feed ramp further down the bullet. Hold the two load up with the HP in front of the RN. I bet you can see the RN from behind the HP. If you can tolerate a longer OAL, that might help. Or..... Have you tried RMR's HPs. Very popular around here. That's what I'll try next. I'm currently running the HP Deltas at 1.15. weird part is they load fine if the mags are down loaded a few rounds. If I fill em up they're nose diving in mag. Just had all feed lips tuned etc. Link to comment Share on other sites More sharing options...
beechnutbob Posted August 15, 2019 Share Posted August 15, 2019 Are you running spaces in the mags? I have two guns that don’t need spacers but one that will not feed the top couple of rounds if spacers are not installed. Now all mags have spacers and all guns feed 100% ola 1.16 with Delta Precision 124 JHP Link to comment Share on other sites More sharing options...
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