.280 Remington

Test barrel: 600 mm (24”), 1 in 10” twist
Primers: Large Rifle
Cases: Peterson Cartridge Co, trim-to length 64,30 mm (2.530”)

Bullet	9,1 g / 140 gr		Barnes, TTSX BT		C.O.L. 83,0 mm / 3.268 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N550	2,80	43.2	786	2579	3,08	47.5	857	2812
N555	3,15	48.6	821	2694	3,39	52.3	879	2884
N160	3,05	47.1	776	2546	3,34	51.5	848	2782
N165	3,40	52.5	812	2664	3,65	56.3	875	2871
N560	3,30	50.9	809	2654	3,58	55.2	880	2887
N565	3,40	52.5	794	2605	3,70C	57.1C	863	2831
N568	3,65	56.3	786	2579	3,75C	57.9C	818	2684
C – Compressed load
Bullet	9,7 g / 150 gr		Berger, Classic Hunter		C.O.L. 82,0 mm / 3.228 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N150	2,70	41.7	772	2533	2,89	44.6	818	2684
N550	2,96	45.7	793	2602	3,15	48.6	857	2812
N555	3,22	49.7	808	2651	3,51	54.2	874	2867
N160	3,25	50.2	790	2592	3,57	55.1	864	2835
N165	3,58	55.2	818	2684	3,86	59.6	888	2913
N560	3,45	53.2	805	2641	3,71	57.3	874	2867
Bullet	9,7 g / 150 gr		Swift, Scirocco II		C.O.L. 83,5 mm / 3.287 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N555	3,10	47.8	792	2598	3,34	51.5	854	2802
N160	3,05	47.1	767	2516	3,33	51.4	829	2720
N165	3,36	51.9	792	2598	3,72	57.4	864	2835
N560	3,32	51.2	794	2605	3,60	55.6	864	2835
N565	3,50	54.0	799	2621	3,71	57.3	854	2802
Bullet	10,1 g / 155 gr		Lapua, Naturalis N564		C.O.L. 82,0 mm / 3.228 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N555	2,77	42.7	729	2392	3,12	48.1	803	2635
N165	3,00	46.3	725	2379	3,34	51.5	797	2615
N560	3,01	46.5	737	2418	3,36	51.9	819	2687
N565	3,10	47.8	723	2372	3,46	53.4	807	2648
N568	3,45	53.2	751	2464	3,75C	57.9C	810	2657
C – Compressed load
Bullet	10,7 g / 165 gr		Sierra, TGK		C.O.L. 84,5 mm / 3.327 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N550	2,71	41.8	739	2425	2,98	46.0	806	2644
N555	3,00	46.3	760	2493	3,28	50.6	822	2697
N160	2,92	45.1	736	2415	3,26	50.3	803	2635
N165	3,30	50.9	776	2546	3,67	56.6	838	2749
N560	3,22	49.7	766	2513	3,53	54.5	836	2743
N565	3,34	51.5	758	2487	3,73	57.6	829	2720
Bullet	10,9 g / 168 gr		Berger, VLD Hunting		C.O.L. 84,5 mm / 3.327 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N550	2,84	43.8	747	2451	3,07	47.4	808	2651
N555	3,09	47.7	757	2484	3,35	51.7	820	2690
N160	2,95	45.5	739	2425	3,33	51.4	806	2644
N165	3,40	52.5	774	2539	3,70	57.1	835	2740
N560	3,38	52.2	770	2526	3,58	55.2	831	2726
Bullet	11,3 g / 175 gr		Berger, Elite Hunter		C.O.L. 84,5 mm / 3.327 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N550	2,75	42.4	723	2372	2,99	46.1	785	2575
N555	2,98	46.0	735	2411	3,24	50.0	795	2608
N160	2,99	46.1	721	2365	3,22	49.7	779	2556
N165	3,32	51.2	751	2464	3,66C	56.5C	816	2677
N560	3,23	49.8	745	2444	3,55	54.8	816	2677
N565	3,40	52.5	745	2444	3,69C	56.9C	807	2648
N568	3,60	55.6	737	2418	3,85C	59.4C	781	2562
C – Compressed load
Bullet	11,7 g / 180 gr		Berger, VLD Hunting		C.O.L. 84,5 mm / 3.327 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N555	2,90	44.8	724	2375	3,10	47.8	769	2523
N160	2,70	41.7	692	2270	3,03	46.8	753	2470
N165	3,15	48.6	729	2392	3,45	53.2	789	2589
N560	3,17	48.9	732	2402	3,46	53.4	797	2615
N565	3,18	49.1	720	2362	3,58	55.2	789	2589
N568	3,37	52.0	725	2379	3,75C	57.9C	783	2569
N570	3,70	57.1	767	2516	3,85C	59.4C	809	2654

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