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magpro and N160 for 270
laogai
Member Posts: 309 ✭✭✭
i notice that some manuals list magpro and N160 loads for 270 win 130 grain bullets around max 3200 fps. this is about 200fps than most other powders listed.
anyone have experience with these powders in a 270?
anyone have experience with these powders in a 270?
Comments
This is from the VihtaVuori reloading guide:
Bullet Powder Starting load Maximum load
Weight Type Mfg. C.O.L. Type Velocity Weight Velocity
[grs] [in.] [grs] [fps] [grs] [fps]
130 SP Remington 3,228 N160 2779 58,0 3083
From the Accurate Arms reloading guide:
130 NOS BT
4064 43.2 2569 4064 48.0 2920 51200 3.330"
2700 49.4 2777 2700 52.0 2954 52000
4350 49.5 2660 4350 55.0 3020 52000
3100 52.2 2577 3100 58.0 2841 51500 Compressed
Magpro 58.5 2919 Magpro 65.0 3234 63200 Pressure in Psi
130 BAR X-HP
4064 44.1 2557 4064 49.0 2906 49800 3.330"
2700 50.4 2765 2700 53.0 2941 51700
4350 52.2 2702 4350 58.0 3070 52000 Compressed
3100 52.2 2616 3100 58.0 2811 48500 Compressed
Slower powders can achieve higher velocities under some circumstances. Note the increase in the operating pressure of the MagPro load as opposed to the other powders. Compressed loads can also act differently than non-compressed loads.
With different lots of powder there can be major changes in both velocity and pressure. The length of the barrel and whether they are using actual chronographs or merely simulating the loads with math can make a difference also.
Best.
not sure I understand the 3,34 in the N160 info. typo?
No, it's the equivalent load in grams instead of grains. I just forgot to remove it so there wouldn't be any confusion. So much for that attempt...
Best.