280/160 partition suggestions

Tobey284

Beginner
Mar 27, 2011
161
1
Hey guys, struggling with the 160 partitions in my 280. Been getting very good accuracy and velocity using imr 7828 and various other brands of bullets (speer 160 boat tails, hornady 162's and sierra 160 hpbt) but everything goes way bad in the accuracy dept. if I try 160 partitions (or accubonds too for that matter, was thinking my rifle might be allergic to nosler but 140 ballistic tips shoot very well). I know there are several guys on here that have had good success with 7828 and 160 partitions. Is there perhaps a magic seating depth I have not tried? The other brands can all be made to shoot under an inch but the noslers fly all over the place.
 
I used 47gn of Varget with 160gn Sierra Game Kings and got a decent group. The average velocity was 2750fps. I don't know what the COL was.

A load with 60gn of Supreme 780 and the 160gn GKs didn't amount to a good group, but it was at 2980fps.
 

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Nice groups! It may come down to trying a different powder with the noslers. velocities with the other bullets are running in the 3000 fps range, was hoping I could get the partitions to do it and call it done (I have many many 160's). I have a little more confidence in the Partition for an all purpose bullet, shot an aoudad ewe with the hornady interlock a few weeks ago and it turned inside out (at 380 yards), killed her just fine but raised some concerns about shooting something bigger and or closer with that bullet.
 
A you using Fed 215 Mag Match primers? That may be the issue. In my .280 I got decent accuracy with all loads but the Mag primers for 7828 SSC seemed to help.
 
How far off the lands are you?

Give IMR 4831 a try.
I loaded the 160 gr PT in 280 Rem with 54.0 grs of IMR 4831and accuracy was .400".

JD338
 
Was very happy with 7828 and the 160 Partition and just as warm and fuzzy with the 160 AB and 7828 using standard cci primers and rem brass which I switched over to Nosler brass my current load is 57 grains of 7828 ( not ssc) with the 160 AB CCI 200 primer and nosler brass this gives me 2880 from a 22" barrel and kills with boring regularity.
 
Using standard CCi primers, tried cci mag primers but didn't seem to make a difference. .030 off the lands as of now, closer was pretty bad.
 
I have found in both my 7mm Rem Mag and my .280 that the 16 Partition seems to shoot better with near factory COAL. It could be the short ogive radius of that bullet which is the root of the problem?
 
The 150 gr PT is another excellent choice in the 280 Rem. It will give you all the penetration you need for elk.

JD338
 
Cartridge : .280 Rem.
Bullet : .284, 160, Nosler PART SP 16327
Useable Case Capaci: 60.217 grain H2O = 3.910 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 60000 psi, or 413 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

153 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Norma MRP 103.2 59.8 3.87 2903 99.4 60000 13559 1.115 ! Near Maximum !
Vihtavuori N560 104.9 59.5 3.85 2889 96.8 60000 13721 1.112 ! Near Maximum !
Ramshot Magnum 107.3 63.8 4.13 2886 97.6 60000 13551 1.104 ! Near Maximum !
PB Clermont PCL 517 107.7 63.8 4.13 2886 97.6 60000 13538 1.104 ! Near Maximum !
SNPE Vectan SP 12 107.5 63.7 4.13 2886 97.7 60000 13520 1.104 ! Near Maximum !
Accurate MAGPRO 105.2 62.1 4.02 2879 95.3 60000 13755 1.118 ! Near Maximum !
IMR 7828 SSC 103.4 58.9 3.82 2873 97.2 60000 13285 1.104 ! Near Maximum !
IMR 7828 109.3 58.9 3.82 2873 97.2 60000 13285 1.104 ! Near Maximum !
Alliant Reloder-22 105.1 59.0 3.82 2870 98.4 60000 13267 1.118 ! Near Maximum !
Bofors RP5/NP ~approximation 105.1 59.0 3.82 2870 98.4 60000 13267 1.118 ! Near Maximum !
Raufoss RA15 105.1 59.0 3.82 2870 98.4 60000 13267 1.118 ! Near Maximum !
Alliant Reloder-25 110.0 60.7 3.94 2869 100.0 57510 13071 1.128 ! Near Maximum !
Winchester WXR 107.9 59.3 3.84 2869 98.3 60000 13276 1.119 ! Near Maximum !
ADI AR 2213 104.3 58.5 3.79 2858 97.1 60000 13132 1.104 ! Near Maximum !
Alliant Reloder-17 92.4 53.8 3.49 2851 100.0 60000 11964 1.118 ! Near Maximum !
ADI AP 2214 108.2 62.3 4.04 2847 97.2 60000 12989 1.102 ! Near Maximum !
Rottweil R905 106.2 58.5 3.79 2833 96.7 60000 12848 1.119 ! Near Maximum !
ADI AR 2209 101.0 55.8 3.61 2827 98.2 60000 12517 1.110 ! Near Maximum !
Alliant Reloder-19 101.6 56.4 3.65 2825 98.3 60000 12591 1.118 ! Near Maximum !
Ramshot Hunter 97.1 55.7 3.61 2823 99.7 60000 12279 1.124 ! Near Maximum !
Bofors RP5 NT ~approximation 107.8 61.0 3.95 2821 94.8 60000 12852 1.108 ! Near Maximum !
Somchem S365 98.9 54.6 3.54 2820 100.0 60000 11439 1.133 ! Near Maximum !
Winchester 760 91.7 53.8 3.49 2819 99.4 60000 12288 1.126 ! Near Maximum !
Hodgdon H414 91.7 53.8 3.49 2819 99.4 60000 12288 1.126 ! Near Maximum !
Bofors RP14 ~approximation 102.3 56.8 3.68 2819 98.3 60000 12502 1.118 ! Near Maximum !
Norma URP 96.6 53.0 3.44 2804 100.0 60000 11768 1.131 ! Near Maximum !
Bofors RP19 ~approximation 96.6 53.1 3.44 2804 100.0 60000 11765 1.131 ! Near Maximum !
Vihtavuori N550 93.8 53.2 3.45 2803 100.0 60000 11903 1.136 ! Near Maximum !
Norma 204 96.3 55.2 3.58 2801 98.1 60000 12248 1.119 ! Near Maximum !
Raufoss RA4 99.5 55.2 3.58 2801 98.1 60000 12248 1.119 ! Near Maximum !
Bofors RP4 ~approximation 99.5 55.2 3.58 2801 98.1 60000 12248 1.119 ! Near Maximum !
Accurate 4350 100.3 53.2 3.45 2801 100.0 60000 11755 1.148 ! Near Maximum !
Hodgdon H4831 107.0 57.7 3.74 2799 96.4 60000 12346 1.115 ! Near Maximum !
Hodgdon H4831 SC 102.8 57.7 3.74 2799 96.4 60000 12346 1.115 ! Near Maximum !
Somchem S385 101.8 57.1 3.70 2792 99.0 60000 12084 1.137 ! Near Maximum !
IMR 4831 101.4 53.9 3.49 2788 100.0 60000 11526 1.140 ! Near Maximum !
Ramshot BigGame 90.1 51.6 3.35 2784 100.0 60000 11318 1.130 ! Near Maximum !
Norma MRP 2 110.0 61.1 3.96 2784 96.3 52413 13429 1.187
SNPE Vectan SP 11 90.2 51.7 3.35 2783 100.0 60000 11303 1.130 ! Near Maximum !
Bofors RP4 NT ~approximation 97.1 54.7 3.55 2781 99.2 60000 11855 1.131 ! Near Maximum !
Winchester Supreme 780 100.2 58.7 3.80 2781 98.1 60000 11966 1.122 ! Near Maximum !
Vihtavuori N165 107.2 58.9 3.81 2778 98.7 60000 11795 1.127 ! Near Maximum !
Vihtavuori N570 110.0 64.4 4.17 2776 89.9 50952 14171 1.194
Alliant Reloder 33 110.0 67.1 4.35 2775 91.0 51552 14074 1.188
Rottweil R904 100.2 54.8 3.55 2772 97.2 60000 11908 1.121 ! Near Maximum !
Hodgdon Hybrid 100V 99.2 53.3 3.45 2768 100.0 60000 10856 1.131 ! Near Maximum !
Lovex S070 96.2 52.8 3.42 2766 99.4 60000 11650 1.140 ! Near Maximum !
Hodgdon H4350 98.9 53.7 3.48 2766 98.9 60000 11605 1.124 ! Near Maximum !
IMR 4350 97.0 53.6 3.47 2765 99.0 60000 11584 1.124 ! Near Maximum !
Bofors RP7 NT ~approximation 91.2 51.0 3.31 2760 99.5 60000 11291 1.113 ! Near Maximum !
Vihtavuori N160 107.0 56.9 3.69 2757 97.1 60000 11699 1.124 ! Near Maximum !
Lovex S071 110.0 57.7 3.74 2752 99.6 57683 11748 1.171 ! Near Maximum !
Accurate 3100 110.0 57.7 3.74 2752 99.6 57683 11748 1.171 ! Near Maximum !
Rottweil R903 91.4 50.2 3.25 2748 100.0 60000 10821 1.152 ! Near Maximum !
Rottweil R907 94.0 51.2 3.32 2746 99.0 60000 11428 1.134 ! Near Maximum !
IMR 4007 SSC 91.0 51.2 3.32 2745 99.0 60000 11420 1.134 ! Near Maximum !
Lovex S065 95.1 51.6 3.34 2745 99.8 60000 11226 1.140 ! Near Maximum !
Somchem S355 91.6 49.7 3.22 2744 100.0 60000 10820 1.145 ! Near Maximum !
Somchem S361 99.2 58.7 3.80 2742 96.4 60000 11664 1.132 ! Near Maximum !
Bofors RP3 NT ~approximation 92.8 51.2 3.31 2739 99.8 60000 11008 1.124 ! Near Maximum !
ADI AR 2208 90.3 48.6 3.15 2736 100.0 60000 10773 1.126 ! Near Maximum !
Hodgdon VARGET 90.6 48.6 3.15 2736 100.0 60000 10773 1.126 ! Near Maximum !
Hodgdon H1000 110.0 60.4 3.91 2730 95.5 52821 12545 1.170 ! Near Maximum !
IMR 4064 91.1 47.7 3.09 2728 100.0 60000 10570 1.131 ! Near Maximum !
Accurate 4064 92.9 48.2 3.13 2710 100.0 60000 10211 1.174 ! Near Maximum !
Vihtavuori N150 96.6 50.6 3.28 2705 100.0 60000 10192 1.144 ! Near Maximum !
Accurate 2700 92.1 52.8 3.42 2702 98.8 60000 10802 1.137 ! Near Maximum !
Hodgdon Retumbo 110.0 61.4 3.98 2671 97.1 45736 13139 1.253
Vihtavuori N135 92.7 46.7 3.02 2662 100.0 60000 9402 1.155 ! Near Maximum !
Lovex D100 110.0 65.7 4.26 2637 84.6 53215 11613 1.185 ! Near Maximum !
ADI AR 2218 110.0 65.0 4.21 2619 84.9 46139 13406 1.248
Vihtavuori 24N41 110.0 65.0 4.21 2602 81.2 48948 11994 1.221
Vihtavuori N170 110.0 60.4 3.91 2576 87.3 47783 11628 1.261
Hodgdon H870 110.0 63.1 4.09 2542 87.3 40429 12770 1.337
Alliant Reloder-50 110.0 66.0 4.28 2490 82.9 37438 12866 1.396
Bofors 12,7mmRA NC1214 Lot20115087 110.0 64.6 4.18 2452 75.3 39795 11820 1.392
Hodgdon 50BMG 110.0 62.0 4.02 2412 72.5 39577 10974 1.356
Hodgdon US 869 110.0 65.0 4.21 2411 76.5 39345 11052 1.361
SNPE Vectan SP 13 110.0 62.4 4.04 2359 80.9 35615 10943 1.426
Vihtavuori 20N29 110.0 65.7 4.26 2301 75.5 33819 10765 1.455
PB Clermont PCL 513/520/9520 110.0 62.4 4.04 2295 77.5 33546 10533 1.462
Accurate 8700 110.0 62.5 4.05 2265 77.2 33010 10381 1.468
NC A3502 ,test only 110.0 59.7 3.87 2111 53.3 31977 7862 1.497
TLP A 502(RH) ,test only 110.0 59.7 3.87 2089 57.8 29797 8370 1.539
Vihtavuori N32C Tin Star 95.7 26.5 1.72 1979 100.0 60000 4319 1.236 ! Near Maximum !
IMR TrailBoss 110.0 20.6 1.33 1731 100.0 40857 3466 1.464
ADI AS 25 BP 110.0 20.6 1.33 1731 100.0 40857 3466 1.464
V1734 7-multiperf ,test only 110.0 59.7 3.87 1497 26.2 16698 3833 2.033
 
I've been messing with 160 gr Gamekings and IMR 4831 with good results. I need to do some fine tuning to finish up the load. I haven't tried the PT, but it's on the list of 160 gr bullets to try.
 
Fotis, I don't have the rifle anymore but my chrono is pretty accurate with all other loads and comparing to others at the range. I swear that I got 3010 average for three shots with the 160 Partition Fed 215 MM and 58.0 of IMR 7828 SSC in my Browning A-Bolt II, 22 inch barrel. Rifles may vary but chrono's don't usually lie one day and not another.
 
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