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Old September 27, 2011, 06:49 AM   #1
micksis86
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Join Date: June 16, 2009
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Can i use IMR 4320 in my 270 Winchester loads?

Hi,
I've got a fair bit of 4320 and I want to use it in my 270 under a sierra 130 gr gameking. The only place that I've found data using this powder is on the hodgon website none of the 5 or so manuals I've got list it. So I just wanted to see if anyone else has used IMR4320 in their 270?

If you have could you list the load if you want to.
As i said it's for a 130gr projectile.
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Old September 29, 2011, 09:35 AM   #2
jepp2
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Join Date: December 24, 2008
Location: Loveland, CO
Posts: 1,343
From the Nosler 6'th manual:

130 gr Nosler bullet, IMR 4320 43 gr 2738 fps 72% volume, 45 gr 2833 fps 75% volume, 47 gr 2928 fps 78% volume.


As you found taken from Hodgdon site:

Cartridge Information
Case: Winchester Barrel Length: 24"
Twist: 1:10" Trim Length: 2.530"
Primer: Winchester LR

270 Winchester
Cartridge Load Data Starting Loads
Maximum Loads
Bullet Weight (Gr.) Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
90 GR. SIE HP IMR 4320 .277" 3.200" 48.5 3220 46,800 CUP 52.7 3425 51,500 CUP
100 GR. SPR SP IMR 4320 .277" 3.145" 46.2 3066 47,100 CUP 50.0 3220 51,000 CUP
110 GR. HDY HP IMR 4320 .277" 3.250" 45.5 3031 48,700 CUP 49.7 3152 50,100 CUP
120 GR. BAR XFB IMR 4320 .277" 3.270" 44.2 2782 43,800 CUP 48.5 3029 51,000 CUP
130 GR. HDY SP IMR 4320 .277" 3.180" 45.6 2850 48,600 CUP 47.0 2916 50,200 CUP
135 GR. SIE BT IMR 4320 .277" 3.340" 43.0 2718 43,500 CUP 46.5 2887 50,300 CUP
140 GR. SFT SP IMR 4320 .277" 3.280" 41.5 2614 42,700 CUP 44.5 2775 50,000 CUP
160 GR. NOS PART IMR 4320 .277" 3.340" 40.0 2453 44,500 CUP 42.8 2584 51,000 CUP

Last edited by jepp2; September 29, 2011 at 09:43 AM. Reason: add detail
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Old July 13, 2012, 01:21 PM   #3
smokey 13
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Join Date: July 10, 2012
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I use imr 4320 in my savage 110 270 hand loads.

My rifle likes 47 gr of imr 4320 under 130 grain nosler ct ballistic tip with federal casings and cci 200 primer. This load shoots 3/4 inch groups @ 200 yards.

I was using this load with fed 210 lr primer but they have lot better group with cci 200

This load came from nosler manual and 47 is max load.



Using the nosler spitzer 130 gr over 43 gr of imr 4320 with fed 210 lr primer fed casings it will shoot 1 1/4 groups @ 200 yards.

Hope this info may help someone browsing through
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