Nightrain Posted February 4, 2012 Share Posted February 4, 2012 This is my first attempt at working up a major load.. I am shooting a bedell built sti 2011 .40 5" barrel All loads were 155 gr MG JHP. Over HS6 at OAL 1.185 Load 1. 7.7 gr. 16 shots Avg. 1078 fps Low 1026 High 1123 Load 2. 7.9 gr. 16 shots Avg. 1069 fps Low. 1028 High. 1104 Load 3 8.1 gr. 16 shots Avg. 1091 Low. 1030 High. 1134 These three loads average. 165 - 169 PF. I would be far more comfortable up around 171. At this point I have no signs of pressure I guess my questions are Did I figure my data correctly. Ie avg the results & calculate All of these loads are with 0 crimp. Have seen no reasons y they need crimped unless someone with mor exp tells me diff I will run another test Sunday with 8.3 & 8.5 grs... I appreciate any input from those of you master loaders out there. Link to comment Share on other sites More sharing options...
deerassassin22 Posted February 4, 2012 Share Posted February 4, 2012 Crimping the round ensure that the bell is not still on the case after you set the bullet. You may not have to crimp them I use my barrel as a case cage to ensure they slide in and fall out nice and smooth. As far as using HS-6 I haven't shot that in a while how full are you casings with powder you may have to watch for a compressed load. I have an STI Eagle 5 inch 40 would be willing to give you load infer for N320 and TG with 180grn lead and MG CMJ 180's just need an email. The main thing I would watch out for is compressing your loads especially since they are short COAL. I load out to 1.160 just to remove and possible issues with pressure I don't load hot anyways but my .02cents. It would also be easier to make PF with a heavy bullet like a 180 unless you just love your 155's. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted February 4, 2012 Share Posted February 4, 2012 Load 1. 7.7 gr. Avg. 1078 fps Load 2. 7.9 gr. Avg. 1069 fps Load 3 8.1 gr. Avg. 1091 Nightrain, sorry, I don't reload .40, but it seems strange that increasing your load by 0.4 grains and you have almost the same velocity?? I'd expect a higher velocity from 0.4 grains more powder. Jack Link to comment Share on other sites More sharing options...
kampr Posted February 5, 2012 Share Posted February 5, 2012 I agree with Jack, something doesn't sound right, 0.4grs should give you a bigger bump. Another thing that would bother me about the results would be the extreme spread. A 100+fps isn’t going to help accuracy or your “confidence factor” going to the chrono stage. A couple of questions. Are you weighing each charge individually for the workup? Are you using the same manufacturer of brass? Are some of the empty cases smoky on the exterior and others not? If so, slight crimp might help there. Link to comment Share on other sites More sharing options...
Nightrain Posted February 13, 2012 Author Share Posted February 13, 2012 Kampr I do weigh each rnd individually... I loaded up 16 more at 8.1 & 8.3 with slight crimp Spread evened out an pf jumped to 172 on the 8.3 load was very consistant. I think this load is going to work very well accuracy and feel in the hand was perfect in my opinion Link to comment Share on other sites More sharing options...
Nightrain Posted February 13, 2012 Author Share Posted February 13, 2012 (edited) I agree with Jack, something doesn't sound right, 0.4grs should give you a bigger bump. Another thing that would bother me about the results would be the extreme spread. A 100+fps isn’t going to help accuracy or your “confidence factor” going to the chrono stage. A couple of questions. Are you weighing each charge individually for the workup? Are you using the same manufacturer of brass? Are some of the empty cases smoky on the exterior and others not? If so, slight crimp might help there. to answer the rest of you questions kampr Yes each charge is weighed individually as i dont trust my dispenser for major charges it doesnt seem that regular.... mixed brass.. mostly federal ... some of the cases were smokey on the exterior some were not ... i loaded up another 10 rnds at 8.1 and 10 at 8.3 the 8.1 set increased to avg of 1108 with a spread of approx 50 fps the 8.3 was an avg of 1148 with spread of approx 50 fps both loads with a very slight crimp ... no signs of pressure no smokey cases ... the 8.3 shot very accurate and was a nice feel in the palm .. i am very happy with the load ill let you know how it goes this sunday as i have my first USPSA with the new boom stick ready to go ... in practice i was shooting 3 uspsa targets at 25 ft 4 ft apart with 2 to the body and 2 to the head with an avg time of 8.27 sec with mostly As to the body and a-b to head ... i was very impressed with the accuracy of the round ... just have to get a happy feel for the dot bounce and i will be blazing ... I LOVE IT thanks for the deal Edited February 13, 2012 by Nightrain Link to comment Share on other sites More sharing options...
Nightrain Posted February 13, 2012 Author Share Posted February 13, 2012 Crimping the round ensure that the bell is not still on the case after you set the bullet. You may not have to crimp them I use my barrel as a case cage to ensure they slide in and fall out nice and smooth. As far as using HS-6 I haven't shot that in a while how full are you casings with powder you may have to watch for a compressed load. I have an STI Eagle 5 inch 40 would be willing to give you load infer for N320 and TG with 180grn lead and MG CMJ 180's just need an email. The main thing I would watch out for is compressing your loads especially since they are short COAL. I load out to 1.160 just to remove and possible issues with pressure I don't load hot anyways but my .02cents. It would also be easier to make PF with a heavy bullet like a 180 unless you just love your 155's. Cases are no where near full .. no compression as of yet ... Link to comment Share on other sites More sharing options...
Amerflyer48 Posted February 15, 2012 Share Posted February 15, 2012 as far as the 7.7 vs. the 7.9 fps "flatness" keep in mind pressure is not linear therefore velocity isn't.. Some powders have flat spots,.. some just before they spike so go easy and watch/feel for anything as you go with heavier charges..looks like you found a flat spot and no spike I am happy for you we had a .38 Super load go along then flatten then spike and separate a case WSL used to do this in my 10mm come up then flatten out then jump.... to top it off it was also inverse temp sensitive tough to find out at your first Area match. John Link to comment Share on other sites More sharing options...
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