pbcaster45 Posted January 20, 2015 Share Posted January 20, 2015 My STI Trubor 38 Trubor should be arriving later this week and I'm not sure where to start load wise. I've loaded my Kimber 38 Super to major with Power Pistol but I'd rather avoid the impressive muzzle flash. Is this a good starting load using what I've got on hand? Bullet: MG 124 gr. JHP Powder: 8.2 grs. IMR 4756 Primer: WSR Case: Starline 38 Super LOAL: 1.235 I've got Starline 38 SC brass too but that's for later (don't know if it's needed yet) Link to comment Share on other sites More sharing options...
mickd1 Posted January 20, 2015 Share Posted January 20, 2015 can't help you with the powder,but all the other information looks good Link to comment Share on other sites More sharing options...
pyrrhic3gun Posted January 21, 2015 Share Posted January 21, 2015 That load gave me 1340fps using Rem JHPs, so you should be close. Seemed fairly temp sensitive, so check again when the weather changes. Link to comment Share on other sites More sharing options...
Guest Posted January 21, 2015 Share Posted January 21, 2015 I'd say that is a good starting point. Here is one that works in my guns with the lot I currently have: SR4756 at 8.5gr MG 124gr JHP at 1.235-1.240" = about 1350fps = 167pf Tula or Win SPP or SRP I like the way SR4756 shoots, but it is a PIA to load as the case is really full. I generally load it on a 550 for this reason however last time I used a 650 and was flicking powder all over (and yes, I have the anti-power flicking mods). Anyway, if you got it shoot it! It is a good shooting powder and works well with the 124 grain bullets. Link to comment Share on other sites More sharing options...
pbcaster45 Posted January 30, 2015 Author Share Posted January 30, 2015 (edited) Here it is along with the last "Space Gun" I bought. Whatever happened to that young guy who was totally happy with a Ruger Blackhawk? Edited January 30, 2015 by pbcaster45 Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted January 30, 2015 Share Posted January 30, 2015 I'd guess you'd be happier with a lighter bullet. Link to comment Share on other sites More sharing options...
pbcaster45 Posted January 30, 2015 Author Share Posted January 30, 2015 Can't make power factor with the phaser.... I'll have to stick with the Trubor! Link to comment Share on other sites More sharing options...
DRichardson Posted January 31, 2015 Share Posted January 31, 2015 I'd back it down a little to start. It only takes 8.3 of 4756 to comfortably make major in my shorty so you may not need that much. Link to comment Share on other sites More sharing options...
pbcaster45 Posted February 1, 2015 Author Share Posted February 1, 2015 (edited) I took the gun to an indoor range today, wanted to do some outdoor chronographing but it rained all day. Gun fed and ejected all test loads 100%. All were very accurate but my favorite was the MG 124 gr. JHP over 8.2 grs. of IMR-4756. I really didn't care for the way the 115s recoiled so it's the 124s and above for me. I went once in the morning and had quite a few problems with the trigger. At times the trigger would jam up with a round in the chamber and a loaded magazine. The pull weight seemed to change also, pretty frustrating! I thought maybe the trigger stop set screw was turned in too far so I went home and removed it. I went for a second range session but removing the set screw made no difference at all. I guess I'll be on the phone with STI Monday unless someone has a suggestion? P.S. Feeling really happy about all that IMR-4756 I bought over the summer! Works great in my Kimber 38 Super but it's even better in the Trubor! Cleanest burning powder tried! Note: All bullets chambered easily and passed the spin test. Bullet: Hornady 115 gr. XTP-HP Powder: Hodgdon CFE Pistol 7.4 grs. Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.245 Recoil Spring: Factory Rounds: 50 Comments: Very accurate and pleasant to shoot, but getting some “corn meal” residue. Bullet: Nosler 115 gr. JHP Powder: IMR-4756 8.8 grs. Primer: Federal 205 Small Rifle Case: Starline .38 Super +P LOAL: 1.233 Recoil Spring: Factory Rounds: 150 Comments: Very accurate but "snappier" than the heavier bullets. Bullet: Montana Gold 124 gr. JHP Powder: IMR-4756 8.2 grs Primer: Federal 205 Small Rifle Case: Starline .38 Super +P LOAL: 1.245 Recoil Spring: Factory Rounds: 10 Comments: This would be a great combination for practice, favorite overall load. Bullet: Montana Gold 124 gr. JHP Powder: IMR-4756 8.5 grs. Primer: Federal 205 Small Rifle Case: Starline .38 Super +P LOAL: 1.245 Recoil Spring: Factory Rounds: 10 Comments: No signs of excess pressure. Bullet: Montana Gold 124 gr. CMJ Powder: IMR-4756 8.2 grs. Primer: Winchester Small Rifle Case: Starline 38 Super +P LOAL: 1.240 Recoil Spring: Factory Rounds: 50 Bullet: Hornady 125 gr. HAP (#35572B) Powder: Alliant Power Pistol 7.6 grs. Primer: Winchester Small Rifle Case: Starline 38 Super +P LOAL: 1.240 Recoil Spring: Factory Rounds: 50 Comments: Much more muzzle flash than IMR-4756. Edited February 2, 2015 by pbcaster45 Link to comment Share on other sites More sharing options...
pbcaster45 Posted February 1, 2015 Author Share Posted February 1, 2015 Just an update on the trigger problem, maybe this will look familiar to someone. I made up 5 dummy rounds (no powder or primer) and fed a round into the chamber. With the magazine and 4 rounds the trigger will intermittently jam up just like the thumb safety was engaged. When the loaded magazine is removed and an empty installed the trigger operates normally. Stumped! What does it mean? Link to comment Share on other sites More sharing options...
pbcaster45 Posted February 2, 2015 Author Share Posted February 2, 2015 Just an update. I wasn't being as methodical as I thought, one of my three magazines functions perfectly. Now I need to compare it to the other two and figure out what's different. Looking up through the magazine well I can't see where the magazines would drag on the trigger bow. Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 19, 2015 Author Share Posted April 19, 2015 (edited) I got my Trubor back from STI last week and they fixed the trigger binding problem. I did have some ammo problems at the range today. I got lazy and set my powder measure to 8.1 grs. of 4756 - bad idea! Got more stovepipes than I could keep track of! My usual load of 8.2 grs. is probably on the edge of good function too. I must have a slow batch of powder. Bullet: Montana Gold 124 gr. JHP Powder: SR-4756 8.1 grs Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.245 Recoil Spring: Factory Bullet: Hornady 125 gr. HAP (#35572B) Powder: SR-4756 8.1 grs Primer: Federal 205 Small Rifle Case: Remington .38 Super +P (Nickel Plated) LOAL: 1.240 Recoil Spring: Factory Hmmm... I wonder if the cooler temperatures back in January were a factor too? Edited April 19, 2015 by pbcaster45 Link to comment Share on other sites More sharing options...
sauza45 Posted April 19, 2015 Share Posted April 19, 2015 I shoot 38sc and use the Hornady 125 hap with N105. If you have some or can get it I would try N105 Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 19, 2015 Author Share Posted April 19, 2015 Darryl, I've got three bottles of "Unobtainium" but I haven't had much time to work with it. Here's the load I have tried, how does this compare to your 38sc data? Bullet: Hornady 125 gr. HAP (#35572B) Powder: VihtaVuori N105 9.5 Primer: Winchester Small Rifle Case: Starline 38 Super +P LOAL: 1.240 Link to comment Share on other sites More sharing options...
Steve RA Posted April 19, 2015 Share Posted April 19, 2015 I used 4756 in my 9 major Glock and .38 Super CMC and really liked it, but, from what I've read it is being, or has been, discontinued by Hodgdon so I hope you have a lot of it in stock. Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 19, 2015 Author Share Posted April 19, 2015 (edited) Steve, I read some of your other post about 4756 and ended up getting one 8 lb jug - think I've got about 6 lbs left. A shame, it works great! Edited April 19, 2015 by pbcaster45 Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 20, 2015 Author Share Posted April 20, 2015 (edited) No doubt about it, under loaded ammo. Cleaned the gun last night and tested it again today. Everything was 100% though I did seat the MG 124 gr. JHP just a little deeper with my original charge of 4756. I tried a few rounds with 8.3 grs. and that might be even better. Bullet: Montana Gold 124 gr. JHP Powder: SR-4756 8.2 grs Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.240 Recoil Spring: Factory Bullet: Montana Gold 124 gr. CMJ Powder: VihtaVuori N105 9.5 Primer: Winchester Small Rifle Case: Starline 38 Super +P LOAL: 1.250 Recoil Spring: Factory Wished I had more N105, that stuff is awesome! Edited April 20, 2015 by pbcaster45 Link to comment Share on other sites More sharing options...
truborshooter Posted April 20, 2015 Share Posted April 20, 2015 (edited) My trubor can't be reliably shoot resting the mag on the bench. It will jam up like you mentioned Put it on a real rest or shoot freehand it runs 100% Weight on mag probably jams up the trigger stirup Did you chrono any of these loads? Edited April 20, 2015 by truborshooter Link to comment Share on other sites More sharing options...
sauza45 Posted April 20, 2015 Share Posted April 20, 2015 That is the same load I use except I run 10.5 N105, But I have 4 poppel holes. I shoot a Brazos gives me about 172 pf Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 20, 2015 Author Share Posted April 20, 2015 Nope on the chronograph, planned to do that this weekend but the range was closed for a benchrest match. I've tried to be conservative until I can verify my velocity, hopefully I'll get a chance this Saturday. Link to comment Share on other sites More sharing options...
BiggMike Posted April 21, 2015 Share Posted April 21, 2015 Just an update on the trigger problem, maybe this will look familiar to someone. I made up 5 dummy rounds (no powder or primer) and fed a round into the chamber. With the magazine and 4 rounds the trigger will intermittently jam up just like the thumb safety was engaged. When the loaded magazine is removed and an empty installed the trigger operates normally. Stumped! What does it mean? PBCASTER45, since the dummy round has no primer and you are pulling the trigger; the firing pin is getting caught in the flash hole of the dummy round. This happened to me also when I was checking my mags. I would recommend adding a used primer to your dummy rounds. Make sure you check your firing pin. Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 21, 2015 Author Share Posted April 21, 2015 BiggMike, Everything is good, STI adjusted the trigger bow and it runs like a champ! Well, when I load the ammo properly that is! Link to comment Share on other sites More sharing options...
pbcaster45 Posted April 26, 2015 Author Share Posted April 26, 2015 Finally got out to the range today to chronograph the two loads I like the best. I didn't make 170 PF with either load so it's back to the drawing board! Bullet: Montana Gold 124 gr. CMJ Powder: VihtaVuori N105 9.5 Primer: Winchester Small Rifle Case: Starline 38 Super +P LOAL: 1.250 Avg. Vel.: 1274.64 fps ES: 35.93 SD: 10.29 Recoil Spring: Factory Comments: 158 PF Bullet: Montana Gold 124 gr. JHP Powder: SR-4756 8.3 grs. Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.240 Avg. Vel.: 1291.10 fps ES: 49.48 SD: 16.55 Recoil Spring: Factory Comments: 160 PF Link to comment Share on other sites More sharing options...
pbcaster45 Posted May 13, 2015 Author Share Posted May 13, 2015 I've done some load adjustment using 4756, N105, and Power Pistol - should be able to chronograph those and report back this weekend. In spite of the impressive muzzle flash I've notice something about Power Pistol I've never seen mentioned before - it's tendency to clean out carbon fouling from other powders. It's impressive! Might make a habit of firing a few after each range session to keep the comp clean! After 65 rounds (should have taken a before picture - sorry!) Link to comment Share on other sites More sharing options...
pbcaster45 Posted May 18, 2015 Author Share Posted May 18, 2015 And still more chronograph work - finally getting there as far as making major. Really impressed with Power Pistol, it does flash a lot indoors - but outside it's no problem. I went into my stash of Precision Delta 124 gr. JHPs too, very impressed with the quality. One thing I really like about the Precision Delta bullets is the more consistent LOAL compared to the Montana Golds. Still need to compare for accuracy, the Montana Golds shoot great, especially with Power Pistol. I seated the Montana Golds out slightly with N105 (that stuff really fills up the case!) SR-4756 does too but it seems to compress easily. Bullet: Montana Gold 124 gr. JHP Powder: SR-4756 8.5 grs. Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.240 (.976 with Stoney Point) Avg. Vel.: 1346.61 fps ES: 37.90 SD: 10.81 PF: 166 Recoil Spring: 8 lbs. with Dawson Aluminum Buffer Pad Bullet: Precision Delta 124 gr. JHP Powder: SR-4756 8.5 grs. Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.245 (.976 with Stoney Point) Avg. Vel.: 1346.15 fps ES: 35.94 SD: 12.24 PF: 166 Recoil Spring: 8 lbs. with Dawson Aluminum Buffer Pad Bullet: Montana Gold 124 gr. JHP Powder: VihtaVuori N105 10.0 Primer: Winchester Small Rifle Case: Starline .38 Super +P LOAL: 1.245 (.981 with Stoney Point) Avg. Vel.: 1358.64 fps ES: 26.77 SD: 8.94 PF: 168 Recoil Spring: 8 lbs. with Dawson Aluminum Buffer Pad Bullet: Montana Gold 124 gr. JHP Powder: Alliant Power Pistol 7.6 grs. Primer: Winchester Small Rifle Case: Starline 38 Super +P LOAL: 1.240 (.976 with Stoney Point) Avg. Vel.: 1374.22 fps ES: 44.61 SD: 13.56 PF: 170 Recoil Spring: 8 lbs. with Dawson Aluminum Buffer Pad Link to comment Share on other sites More sharing options...
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