After a frustrating day with 150 grain ABLR, I bought a box of 130 grain Ballistic Tips. I loaded them to 0.20 off for a COAL of 3.36". This group was 61.0 grains of H4831SC and Winchester WLR Primers and new Nosler brass. I am going to load some more of the same to see if this was a fluke but its a nice start. The gun is a factory 2012 Winchester Model 70, with a VX-II 3-9x50mm CDS.
Model 70 Range Day .270 Win 130 Grain Ballistic Tips
- Thread starter Palouser
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DrMike
Ballistician
- Nov 8, 2006
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It is always comforting when the rifle and load act as anticipated. Fine grouping. I will not be surprised if it is repeatable.
Ridgerunner665
Handloader
- Oct 28, 2008
- 2,513
- 288
Load that to 3.34" and watch it print a bughole....maybe, lol.
My 30-06's don't have that much throat in them...at 3.36" with BT's I'm jammed well into the lands....not sure about the new 270, haven't shot, or even seen it yet.
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My 30-06's don't have that much throat in them...at 3.36" with BT's I'm jammed well into the lands....not sure about the new 270, haven't shot, or even seen it yet.
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- Nov 4, 2004
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Nice group. Looks like you are well on your way.
You might want to try seating the bullet deeper and walk that bullet into the group.
JD338
You might want to try seating the bullet deeper and walk that bullet into the group.
JD338
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DrMike
Ballistician
- Nov 8, 2006
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Palouser":37x8ekt1 said:
Code:
Cartridge : .270 Win. (SAAMI)
Bullet : .277, 130, Nosler BalTip 27130
Useable Case Capaci: 60.832 grain H2O = 3.950 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-20.0 85 48.32 2472 1764 31540 8955 84.1 1.465
-18.0 87 49.53 2538 1859 33789 9279 85.6 1.426
-16.0 89 50.74 2604 1957 36207 9598 87.1 1.387
-14.0 92 51.94 2671 2059 38810 9909 88.5 1.343
-12.0 94 53.15 2738 2164 41616 10211 89.8 1.299
-10.0 96 54.36 2806 2272 44632 10503 91.1 1.257
-08.0 98 55.57 2874 2384 47912 10784 92.3 1.216
-06.0 100 56.78 2942 2499 51448 11051 93.5 1.177
-04.0 102 57.98 3011 2617 55278 11304 94.5 1.139 ! Near Maximum !
-02.0 104 59.19 3080 2739 59432 11541 95.5 1.102 ! Near Maximum !
+00.0 107 60.40 3150 2864 63946 11760 96.4 1.067 ! Near Maximum !
+02.0 109 61.61 3220 2992 68861 11960 97.2 1.032 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 62.82 3290 3124 74222 12140 97.9 0.999 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 64.02 3360 3259 80088 12297 98.5 0.967 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 65.23 3430 3397 86502 12430 99.0 0.935 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 66.44 3501 3538 93518 12538 99.4 0.905 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 107 60.40 3311 3165 76866 11763 99.7 0.988 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 60.40 2941 2497 52183 11175 89.1 1.168- Thread starter
- #8
- Nov 4, 2004
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Palouser":1oxgaig4 said:
I would go .005" (1/4 turn on the seating plunger) increments and walk it in.
JD338
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- #10
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Well after 40 plus years of loading for the 270win. I really do believe that the 130gr. Is the pet grained bullet for the 270.
I have always had good accuracy with my rifles using IMR4350 but recently started playing with 4831sc and I truly believe that my accuracy is going to get to the next level. I believe .25MOA is possible.
Blessings,
Dan
I have always had good accuracy with my rifles using IMR4350 but recently started playing with 4831sc and I truly believe that my accuracy is going to get to the next level. I believe .25MOA is possible.
Blessings,
Dan
CatskillCrawler
Handloader
- Jul 30, 2011
- 1,205
- 2
That's a gratifying start with your S.C. production M70 Sporter. I haven't heard of any complaints from that line.
From the looks of your range, you should be able to take full advantage of that .270Win/130gr BT combo and reach out far and straight.
I have always found H-4831 to be a smidgeon more accurate than IMR-4350 but never found IMR-4350 to be less than good. An excellent situation for us .270W aficionados! I keep trying the RL-19 & -22 offerings and found them to be ok to very good but never better than the H-4831 or IMR-4350. I'm currently being teased with the numbers that IMR-7828 and 150gr bullets promise so I'll play around with that combo this spring.
From the looks of your range, you should be able to take full advantage of that .270Win/130gr BT combo and reach out far and straight.
sask boy":3vxqzaab said:
I have always found H-4831 to be a smidgeon more accurate than IMR-4350 but never found IMR-4350 to be less than good. An excellent situation for us .270W aficionados! I keep trying the RL-19 & -22 offerings and found them to be ok to very good but never better than the H-4831 or IMR-4350. I'm currently being teased with the numbers that IMR-7828 and 150gr bullets promise so I'll play around with that combo this spring.
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- #14
CatskillCrawler":34d0y7g6 said:
That is great to hear! I am lucky as my "range day" is in my front yard and I can walk inside and load another and walk out and shoot. This is where I hunt as well and there are quite a few "long" shots as there aren't many trees!
dubyam
Beginner
- Nov 21, 2013
- 150
- 0
CatskillCrawler":3o7f2z5m said:
If you want to get teased some more, take a look at the MagPro data for the 270Win. In a 24" test barrel, velocities were 3200 for the 130, and 3000 for the 150. I can get a copy of the data if you need it. I think MagPro data availability has trimmed down some from Accurate (Western) these days. They used to list it in several cartridges for which they no longer list it. And it was stellar in those rounds (like the 243Win...).
- Thread starter
- #16
CatskillCrawler
Handloader
- Jul 30, 2011
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They do look tempting! Hmmmmm...I think I know of a LGS that has some MagPro in stock. :idea:
dubyam
Beginner
- Nov 21, 2013
- 150
- 0
I checked the most recent data and it's a little lower than the 6-8yr old stuff I have here. Still, impressive velocities for a 270Win. I like MagPro, and intend to burn a bunch of it in my son's 270WSM when he graduates up from the reduced loads we're going to start him on.
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- #19
Yes you'll need to chrono it. Otherwise you're fumbling in the dark really.
Really, 3100fps is plenty with that bullet. Some testing I did with 130g BTs in wet newspaper showed much reduced penetration when pushed hard. At slightly more moderate impact speeds it performed a lot better.
The tests are in the Bullet Test section under .277 (unsurprisingly!).
Really, 3100fps is plenty with that bullet. Some testing I did with 130g BTs in wet newspaper showed much reduced penetration when pushed hard. At slightly more moderate impact speeds it performed a lot better.
The tests are in the Bullet Test section under .277 (unsurprisingly!).
