.270 WSM

Test barrel: 520 mm (20½”), 1 in 9” twist
Primers: Large Rifle Magnum
Cases: Winchester, trim-to length 53,10 mm (2.091”)

Bullet	5,8 g / 90 gr		Sierra, HP		C.O.L. 68,6 mm / 2.701 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N160	4,00	61.7	1021	3350	4,47	69.0	1130	3707
N165	4,59	70.8	1041	3415	4,75F	73.3F	1083	3553
N560	4,39	67.7	1020	3346	4,78	73.8	1135	3724
F – Case full
Bullet	9,1 g / 140 gr		Barnes, XFB		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]
N160	3,20	49.4	800	2625	3,71	57.2	899	2949
N165	3,75	57.9	832	2730	4,10	63.3	913	2995
N560	3,49	53.9	806	2644	3,93	60.6	918	3012
Bullet	10,4 g / 160 gr		Nosler, Partition		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]
N160	3,20	49.4	737	2418	3,47	53.5	825	2707
N165	3,30	50.9	769	2523	3,90	60.2	863	2831
N560	3,36	51.8	774	2539	3,82	58.9	873	2864

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