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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.

 

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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 

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1 hour ago, Richiew 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.  

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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

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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

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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.

 

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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 . 👍👍

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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.

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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

image.thumb.png.a2a8f7d9160fe33bd8de2fbba5b60644.png

 

With N150, I've made the max load 39gr as I was getting overpressure warnings with 40gr

image.thumb.png.3ff25117c60d32be6951f0b7e693fa81.png

 

IMR 4166, again dropped the max load because of pressure warnings

image.thumb.png.86b6cfe4e74293859936f9b4e50a8838.png

 

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.

image.thumb.png.d4148a1609fe535485ab71a78da14953.png

 

 

 

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