levelplaying Posted December 27, 2021 Report Share Posted December 27, 2021 I have some Nosler Accubond LR 129 gr 6.5 .264 bullets and a choice of Vihti N150, N160, IMR4166 & H380 powder. My Lyman reloading book does not have the 129gr bullet listed for the .260 and nor can I find any reloading data for the .260 with my current choice of powders. Below is an extract from the Hodgdon reloading data centre: Bullet Weight 130 GR. NOS AB Case Remington Primer Remington 9 1/2, Large Rifle Starting Load Maximum Loads Manufacturer Powder Bullet Diam. C.O.L Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure Hodgdon H380 Out of Stock 0.264" 2.780" 37.8 2,572 50,800 PSI 40.7 2,738 58,900 PSI IMR IMR 4166 Out of Stock 0.264" 2.780" 33.0 2,535 50,100 PSI 35.9 2,717 59,400 PSI I have also copied the load data below for N150 and N160 from the Vihti site Bullet 8,4 g / 130 gr Barnes, TSX C.O.L. 70,8 mm / 2.787 inch Powder Starting load Maximum load Type Weight Velocity Weight Velocity [g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps] N540 2,17 33.5 720 2362 2,44 37.7 810 2657 N550 2,26 34.9 717 2352 2,59 40.0 816 2677 N160 2,32 35.8 702 2303 2,75 42.4 808 2651 Bullet 8,5 g / 130 gr Berger, Hybrid OTM Tactical C.O.L. 71,0 mm / 2.795 inch Powder Starting load Maximum load Type Weight Velocity Weight Velocity [g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps] N540 2,22 34.3 762 2500 2,51 38.7 844 2769 N150 2,17 33.5 746 2448 2,46 38.0 821 2694 N550 2,45 37.8 777 2549 2,70 41.7 855 2805 N160 2,71 41.8 786 2579 2,97 45.8 862 2828 Bullet 8,5 g / 130 gr Berger, VLD Target C.O.L. 71,0 mm / 2.795 inch Powder Starting load Maximum load Type Weight Velocity Weight Velocity [g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps] N140 2,11 32.6 739 2425 2,38 36.7 814 2671 N540 2,19 33.8 761 2497 2,48 38.3 843 2766 N150 2,09 32.3 741 2431 2,42 37.3 815 2674 N550 2,46 38.0 778 2552 2,69 41.5 856 2808 N555 2,59 40.0 792 2598 2,84 43.8 864 2835 Bullet 8,5 g / 130 gr Scirocco II, Swift C.O.L. 71,0 mm / 2.795 inch Powder Starting load Maximum load Type Weight Velocity Weight Velocity [g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps] N140 2,06 31.8 719 2359 2,32 35.8 785 2575 N540 2,12 32.7 734 2408 2,45 37.8 819 2687 N150 2,02 31.2 722 2369 2,34 36.1 795 2608 N550 2,30 35.5 742 2434 2,60 40.1 828 2717 N560 2,74 42.3 762 2500 3,00 46.3 846 2776 Is it safe to adopt the 130gr bullets load data and decrease the charge by a couple of gr. at either end of the scale Any advice would be appreciated. Quote Link to comment Share on other sites More sharing options...
One on top of two Posted December 27, 2021 Report Share Posted December 27, 2021 Your be fine with that data , just work your loads up . the bullet weight does NOT have to be exact , as with all data it’s ONLY a starting point for you to work from. Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 27, 2021 Report Share Posted December 27, 2021 Just had a look at nosler web and they recommend an accuracy load with 39 grain max of RL15 similar to a n140 load . I usually find that the case filled to the edge of the neck taper works well , then empty that out and measure the weight. Load up from 10% lower than max so start at 35 and work up . Cheers Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 27, 2021 Report Share Posted December 27, 2021 6.5-CM-130gr-version-9-0.pdf Quote Link to comment Share on other sites More sharing options...
jcampbellsmith Posted December 27, 2021 Report Share Posted December 27, 2021 I've had success with N160 in my 260 Rems. Regards JCS Quote Link to comment Share on other sites More sharing options...
Laurie Posted December 27, 2021 Report Share Posted December 27, 2021 1 hour ago, Richiew said: 6.5-CM-130gr-version-9-0.pdf 869.35 kB · 4 downloads Errr .......... He's loading 260 Rem, your data is 6.5mm Creedmoor! No harm done as the 260 has a larger capacity case so pressures are reduced, but in reverse not a good idea. For the OP, what brass and primers are you using? Changing these components does affect pressures too alongside the use of a different bullet. Quote Link to comment Share on other sites More sharing options...
jcampbellsmith Posted December 27, 2021 Report Share Posted December 27, 2021 When I started reloading for the 260 Rem in 2007, I used Remington brass from the rounds that I had fired. It was dire with different batches showing a case weight variation of in excess of 5 grains. I used to sort it into batches with a 1 grain variation in case weight. When Nosler brass became available, I leapt at that. Nowadays, I only use Lapua brass. I would suggest given the current costs of reloading components, that you select one type of quality 260 Rem Brass and buy as many cases as you can afford? Good luck. JCS Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 27, 2021 Report Share Posted December 27, 2021 1 hour ago, Laurie said: Errr .......... He's loading 260 Rem, your data is 6.5mm Creedmoor! No harm done as the 260 has a larger capacity case so pressures are reduced, but in reverse not a good idea. For the OP, what brass and primers are you using? Changing these components does affect pressures too alongside the use of a different bullet. How’s this !! sorry didn’t read carefully enough . there’s a Vihtavuori powder too B30F078B-3A01-4F8B-A87B-8EBF2ABAA44C.webp Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 27, 2021 Report Share Posted December 27, 2021 260-Rem-130gr-version-9-0.pdfTry this one if the previous don’t work . Cheers Quote Link to comment Share on other sites More sharing options...
jcampbellsmith Posted December 27, 2021 Report Share Posted December 27, 2021 https://www.nosler.com/260-remington Regards JCS Quote Link to comment Share on other sites More sharing options...
levelplaying Posted December 28, 2021 Author Report Share Posted December 28, 2021 Thank you all for your replies. I have, in the main Peterson brass, and a small quantity of Remington. In terms of primers, I have a selection of Murom, CCI and Federal. At this present moment, I only have N150, N160, IMR4166 and H380 and wanted to know which if any of these might work with some suggested load data. I wanted to avoid purchasing a fifth powder, but if I had to then the RL19 as per the Nosler data sheet seems the best recommendation. Quote Link to comment Share on other sites More sharing options...
One on top of two Posted December 28, 2021 Report Share Posted December 28, 2021 It maybe worth remembering that Peterson brass is ( all the Peterson brass I have and still use ) it’s quite a bit thicker and has a slightly lower case capacity than say lapua brass and quite a few other makes. As such it will give you higher pressures , so you may very well find that starting the normal 10% lower on your work up loads may well be near your max load with the Peterson brass . just keep it in mind . 👍👍 Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 28, 2021 Report Share Posted December 28, 2021 Hi there look at Vihtavuori web page and I think you’ll find very similar charge weights with N150 and the 550 version so your N150 powder should do the trick just a bit slower. Cheers Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 28, 2021 Report Share Posted December 28, 2021 The figures for Berger 130 grain OTM favour N160 so that might be a better bet and faster than the N550 . Good luck Quote Link to comment Share on other sites More sharing options...
Richiew Posted December 28, 2021 Report Share Posted December 28, 2021 http://www.henrykrank.com/media/pdfs/BurnRateChart%20_2018.pdf Quote Link to comment Share on other sites More sharing options...
Laurie Posted December 28, 2021 Report Share Posted December 28, 2021 4 hours ago, One on top of two said: It maybe worth remembering that Peterson brass is ( all the Peterson brass I have and still use ) it’s quite a bit thicker and has a slightly lower case capacity than say lapua brass and quite a few other makes. As such it will give you higher pressures , so you may very well find that starting the normal 10% lower on your work up loads may well be near your max load with the Peterson brass . just keep it in mind . 👍👍 Yes, totally agree. I reported on this a year or so back in Target Shooter online e-zine. http://www.targetshooter.co.uk/?p=3483 I recommended dropping charges by a half grain or so from Lapua maximum levels and 1-1.5gn from the Remington case based loads in most powder/bullet company data provided online or in reloading manuals. Scroll down past the 260 Rem N500 powders tests to a follow-on about Peterson brass. @levelplaying you may find my findings on the 142gn Sierra MK in 260 Rem with four N500 series powders of interest, too. Quote Link to comment Share on other sites More sharing options...
nCognitos Posted December 29, 2021 Report Share Posted December 29, 2021 Might I suggest GRT, it's free and you can model away to your heart's content, though usual warning, start small and work up. Use GRT to give you an idea and then confirm with manufacturers data that you are considering sensible loads. GRT is not a substitute for properly working up loads from a minimum safe value. Anything below is for the purposes of entertainment only and should not be used as load data. When I'm playing with GRT, I tend to look for a 100% propellant burn and an efficiency over 30%, then I sort the results by pressure, with the lowest first. Anyway GRT does have the 129gr Accubond in its database, though I cannot find H380 For N160 - might leave a lot of residue as it appears to only burn 90% of the propellant, the other two are a 100% burn With N150, I've made the max load 39gr as I was getting overpressure warnings with 40gr IMR 4166, again dropped the max load because of pressure warnings Running a search to give a MV of 2,700 ft/s, with burn characteristics within 5% of N150 and constraining it to 100% burnt propellant, you can see N150 and IMR4166 are very close together. I've sorted by peak pressure starting with the smallest, as that's the way I tend to view the list. Quote Link to comment Share on other sites More sharing options...
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