270 Winchester 130 grain partition

[Mark Z]

Any recommendations for .270 Winchester Sako model 75 Hunter 22" barrel for IMR4831 and the 130 grain Partition? I currently use 57.5 grains in Winchester and Remington brass with CCI 200 primers and the 130 grain ballistic tip to get sub MOA and 3040 fps. Can I expect the same with the Partition? Any suggestions to get to 3200 fps with 130 grain Partition?

 

[340boy]

I just loaded some 130 grain partitions for my M70 featherweight 270win. I am going to try 56.5/57/57.5/58grains of RL22. My "winny" tends to run pretty slow, so I can usually(not always) run my maxes a little higher.
I would think that you should obtain over 3000 with 130 grain partitions with your 130 gr Ballistic Tip load, no problem. Accuracy? Hard to say, You will have to shoot em and find out! Let us know how it goes and welcome to the forum!! :grin:

 

[Mark Z]

Thanks for the feedback. I have also tried RL22 with 130 grain Balistic Tips and Partitions in my .270 Winchester with the following combinations:

130 grain Balistic Tip - group sizes from .75" to 1.3" (100 yards)

57.5 grains RL 22 Remington brass CCI 200 primer = 3006 - 3049 fps
58.0 grains RL 22 Remington brass CCI 200 primer = 3074 - 3082 fps
58.5 grains RL 22 Remington brass CCI 200 primer = 3113 - 3116 fps
58.5 grains RL 22 Remington brass CCI 200 primer = 3113 - 3116 fps
59.0 grains RL 22 Remington brass CCI 200 primer = 3140 - 3150 fps

130 grain Partition .991" to 1.526" (100 yards)
59.0 grains RL 22 Remington brass CCI 200 primer = 3113 - 3126 fps 1.526"
59.5 grains RL 22 Winchester brass CCI 200 primer = 3066 - 3092 fps .991"
60.0 grains RL 22 Remington brass CCI 200 primer = 3110 - 3140 fps 1.264"

I did not experience any signs of high pressure, even at 60 grains of RL 22, although I did not like the accuracy with the partitions. Hope this helps.

 

[Bruce Mc]

Mark, looking at your velocity figures for the Partition load, given that the velocity from the 50 and 60 grain loads are for the most part identical, I would think you are pret nar that max. When a grain of powder in a .270 doesn't show an appreciable gain in velocity, your topping out. Unless of course there is a typo.

 

[340boy]

Thanks for the info,Mark!
I will keep those loads in mind, although I am using WW brass and Fed 210M primers. Sounds like you are getting good velocities. Nosler actually lists RL22 at 58.0grains(their max) as the most accurate load tested with RL22, so we will see how it goes!
Just curious, what sort of OAL were you using for those loads?
Tim

 

[Alaska]

Reloader 22 the best powder I have used in the 270 Win and 270 WSM


270 Win
62.0 of RL22
130 Part or BT or Barnes TSX
Fed 210 Match Primer
Fed or WW brass


Super good Load!

Another good load would be

140 Nosler AB and 60.0 of RL22
Rifle: Winchester M70 Max COL: 3.340"
Barrel: 24" Reloading Dies: RCBS
Max case length: 2.540" Group distance: 100 yards
Note: c=compressed load

Bullet Type
Bullet Weight
Bullet Diameter
C.O.L.
Net Water Capacity
Powder Type
Charge
Primer Type
Muzzle Velocity
Muzzle Energy
Group Size


Barnes XLC XBT 130 .277" 3.340" 60.8 Reloder 19 59.0 CCI 200 3150 2865 1.1
*Barnes XLC XBT 130 .277" 3.340" 60.8 Reloder 22 61.5 CCI 200 3190 2938 0.4
Barnes XLC XBT 130 .277" 3.340" 60.8 RS Magnum 65.0 CCI 200 3180 2920 1.0
Barnes XLC XBT 130 .277" 3.340" 60.8 IMR 4831 59.0 CCI 200 3140 2847 1.2
Barnes XLC XBT 130 .277" 3.340" 60.8 Win 760 55.0 CCI 200 3100 2775 1.8
Hornady SP Interlock 130 .277" 3.210" 61.2 Reloder 19 59.0 CCI 200 3160 2883 1.1
Hornady SP Interlock 130 .277" 3.210" 61.2 Reloder 22 62.0 CCI 200 3220 2994 0.6
Hornady SP Interlock 130 .277" 3.210" 61.2 IMR 4350 56.0 CCI 200 3130 2829 1.6
Hornady SP Interlock 130 .277" 3.210" 61.2 IMR 4831 59.0 CCI 200 3120 2811 1.0
Sierra SBT 140 .277" 3.300" 60.6 Reloder 19 57.0 CCI 200 3030 2855 0.7
* Sierra SBT 140 .277" 3.300" 60.6 Reloder 22 60.0 CCI 200 3090 2969 0.5
Sierra SBT 140 .277" 3.300" 60.6 RS Magnum 63.0 CCI 200 3050 2893 0.8
Sierra SBT 140 .277" 3.300" 60.6 IMR 4831 58.0 CCI 200 3040 2874 0.8
Sierra SBT 140 .277" 3.300" 60.6 Win WXR 60.0 CCI 200 3010 2817 1.5
Nosler Partition 150 .277" 3.320" 60.7 Reloder 19 56.5 CCI 200 2960 3114 1.3
Nosler Partition 150 .277" 3.320" 60.7 Reloder 22 59.0 CCI 200 3000 3198 1.0
Nosler Partition 150 .277" 3.320" 60.7 RS Magnum 62.0 CCI 200 2920 3030 0.9
Nosler Partition 150 .277" 3.320" 60.7 Win 760 50.0 CCI 200 2900 2989 1.3
Nosler Partition 150 .277" 3.320" 60.7 IMR 7828 59.0 CCI 200 2990 3177 1.1

 

[340boy]

Alaska,
Thank you very much for the info!
I am looking forward to trying the 140 grain AB in my 270. I ordered a McMillan stock for my rifle, should be sweet, and I want to have plenty of loads to try when I get her restocked!
:grin: :grin:

 

[Mark Z]

Hello 340boy,

.270 Winchester

My trim length is: 2.54"

My OAL is: 3.370" MAX in my Sako 75 Hunter

Good Luck!

Bruce Mc,

Thanks for the feedback. I agree; I think I am near max with these loads.

 

[Zeke Menuar]

60gr H4831SC

ZM

 

[Mark Z]

TYPO MISTAKE:

.270 Winchester OAL in my Sako 75 Hunter is: 3.350" (not 3.750")

Sorry,
Mark