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R22

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Bob,

As noted earlier, I just did a bunch of .270 testing and you just can't get enough RL-25 in a .270 case to get any more velocity than with RL-22.

I did get a little over 3000 with 150's and RL-22 in a 26" barrel, but it didn't get 3100 with 140's even from the longer barrel. In fact, even from the 26" the fastest velocities with 130's were around 3150. I know other people have reported 3200 or even more from 130's in 26" barrels, but this particular rifle wouldn't do it with published data.

Of course, you can always add extra powder to get whatever velocity's desired. In fact I would bet one of Jack O'Connor's favorite sugar cookies that a 140 would go 3100+ from a 26" barrel or even a 24", using RL-22 even with published data when shooting at 100 degrees Fahrenheit.


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Barnes online lists 56gr of Hunter will give 3045fps. Not 3100, but pretty close:

http://www.barnesbullets.com/wp-content/uploads/2007/05/270WinchesterWeb2.pdf


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John I forget what Barnes said the velocity was for that RL25 load, and I am working from memory...but as I recall the super slick coating of that XLC blue bullet was supposed to make a difference.

Anyway my velocity reading came from one of those little crony units so who knows(?),but it did come up at about 3200 with the 130 XLC. I didn't think the load was too practical because it was very heavily compressed...lots of crunching....and I was concerned the bullets would back out.

I started to do some testing with conventional bullets ad RL25 but lost track of it.




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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I see that Powder Valley has 1 and 8 pounders of Mag Pro. Just now checked.

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Put me in the camp with Magpro or Magnum. Possibly Hunter as well. I've shot the 130 Partition at 3150+ with Magpro in my 24" M70 and I've seen others report they've broken 3200 fps with it.

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In the long run, chasing that performance isn't worth the effort. Besides, the manufacturer had something unavailable as has already been pointed out.
Accuracy trumps speed if that comparison arrises.


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Originally Posted by RinB
Can't be done within SAAMI pressure limits.


Yep, I agree with that. I couldn't get 3100fps out of 140gn pills in my .280Rem, so it would be even harder trying to squeeze the same weight pill down a smaller bore.

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Not the same parameters. This is the 140 BT with a 22 inch barrel. Posted elsewhere.

Looks like 3100fps is just pushing the boundaries a bit if you believe QL.

Cartridge : .270 Win. (SAAMI) Bullet : .277, 140, Nosler BalTip 27140 Useable Case Capaci: 59.609 grain H2O = 3.870 cm� Cartridge O.A.L. L6: 3.340 inch = 84.84 mm Barrel Length : 22.0 inch = 558.8 mm Powder : Alliant Reloder-22

Predicted data by increasing and decreasing the given charge, incremented in steps of 1.0% 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

-10.0 97 53.99 2722 2304 44659 12445 94.0 1.239
-09.0 98 54.59 2756 2361 46275 12603 94.6 1.219
-08.0 99 55.19 2789 2419 47952 12757 95.1 1.198
-07.0 100 55.79 2823 2478 49698 12906 95.7 1.178
-06.0 102 56.39 2857 2537 51514 13050 96.1 1.159
-05.0 103 56.99 2890 2597 53404 13188 96.6 1.140
-04.0 104 57.59 2924 2658 55370 13321 97.0 1.121 ! Near Maximum !
-03.0 105 58.19 2958 2720 57417 13448 97.4 1.102 ! Near Maximum !
-02.0 106 58.79 2992 2782 59553 13568 97.8 1.084 ! Near Maximum !
-01.0 107 59.39 3025 2845 61774 13682 98.2 1.066 ! Near Maximum !
+00.0 108 59.99 3059 2909 64092 13790 98.5 1.049 ! Near Maximum !
+01.0 109 60.59 3093 2974 66497 13891 98.8 1.031 !DANGEROUS LOAD-DO NOT USE!
+02.0 110 61.19 3127 3039 68994 13985 99.0 1.014 !DANGEROUS LOAD-DO NOT USE!
+03.0 111 61.79 3160 3105 71593 14071 99.3 0.998 !DANGEROUS LOAD-DO NOT USE!
+04.0 112 62.39 3194 3171 74300 14151 99.5 0.981 !DANGEROUS LOAD-DO NOT USE!
+05.0 113 62.99 3228 3239 77123 14222 99.6 0.965 !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 108 59.99 3214 3212 78355 13446 100.0 0.965 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 108 59.99 2847 2519 51018 13314 92.0 1.158

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My Tikka shoots a 140 grain Berger out of a 22" bbl at 2980 using 58.2 grains of 4831sc. No accessive pressure signs and brass lasts a long time. Shoots like a varmint gun too.


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Originally Posted by dingo
Originally Posted by RinB
Can't be done within SAAMI pressure limits.


Yep, I agree with that. I couldn't get 3100fps out of 140gn pills in my .280Rem, so it would be even harder trying to squeeze the same weight pill down a smaller bore.


Ramshot lists three of the four 140 grn bullets used in their data breaking 3050 with Magpro in a 24". Close enough it's a moot point.

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It seems to me that if you want 3100fps with a 140 gr bullet in your 270, you are not going to get it, unless you go to a 270 Weatherby or Maybe the 270WSM, I never gotten a 140 gr bullet to shoot very well in any of the 270's I owned in the pass, never found it to be lacking, since I killed ever thing I shot with 130 gr bullets, I don't know if its worth going thru the expense for that 100 to 150 fps difference or not, that is your call on that one. You could just work up a good load, and call it 3100 fps in your head and leave it at that, the game will never know and its doubt full that you would be able to tell under field shooting conditions. You can just put so much fuel into a 30-06 size case and that it, more fuel is going to require a bigger case for very little real gain- that is just how it is, What voodoo federal did with those "High Energy" loads could be a subject to a whole book ! They were great if they shot well in your rifle!


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I don't think the OP is going to reach 3100 with 140's and current powders. I run a lot of R22 and see 3165 out of a 26" barrel, with 130 ballistic tips. The load is a hair above book, but superbly accurate. For tougher game I'll probably just use Accubonds in the same weight.

I do see there is now data on Alliant's website, like someone else posted, for new Reloader 23 and 26 powders in the .270 WSM. That's interesting, especially if they are more temp resistant.


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Originally Posted by M1Garand
Originally Posted by dingo
Originally Posted by RinB
Can't be done within SAAMI pressure limits.


Yep, I agree with that. I couldn't get 3100fps out of 140gn pills in my .280Rem, so it would be even harder trying to squeeze the same weight pill down a smaller bore.


Ramshot lists three of the four 140 grn bullets used in their data breaking 3050 with Magpro in a 24". Close enough it's a moot point.


What Magpro says doesn't really mean anything. Book velocity and real life velocity are often two completely different things.

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I agree but often they're not. 3000-3050 is very doable.

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After some posts on here I went and checked out Alliant's site and they have 2 new powders - RL23, RL26. They are showing several loads for 150s w/RL26 that is 3030-3040 fps with 150s (no update on 140s) so maybe another good one to check out.

Lou

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From Alliant Load Guide:
MagPro
140
BERGER
VLD
55.4
2,731
61.6
3,020
64,324
3.250
140
HDY
BTSP
57.0
2,808
63.3
3,062
64,603
3.210
140
NOSLER
A-BOND
56.4
2,810
62.7
3,054
64,800
3.340
140
SIERRA
SBT GK
56.5
2,819
62.8
3,051
64,447
3.25


Ed

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You'll get very close with R22, but it would be wise to work up carefully.

I actually worked up to 3040 to 3050 fps with the 150g SST using both R22 and H4831SC. The 4831 load was so full it pushed the bullet out a little but it still fitted the mag and shot very accurately. It did nit seem to be breathing excessively heavy either. Eventually backed off to around 2940fps.

3000fps is really plenty though with a 140 grainer. Try some R22.

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Originally Posted by John_Gregori
I finally used up my supply of old factory Federal "High Energy" 140 gr. TBBCs that chrono'ed 3,078-3,102 fps in my 24" model 70. I've had great success with these on all kinds of big game.

Would you have any suggestions on how to replicate 3,100-ish fps with Northfork 140gr or 140gr TSX? If so, what velocities, bullet, which powders?

I've tried H4350 up to 54.0 gr with the TSX but only get around 2955fps; with no obvious signs of pressure. This is the max listed in the Barnes reloading manual. Barnes is able to get 3,030fps.



You might want to ask Mule Deer about this. I think there's talk of Alliant 26 powder for 150 gr. bullets that get up to 3100 FPS. . If so, you might be able to get 3200 FPS with 140 gr. bullets.

BTW, I think NorthFork discontinued their 140 gr bullets so only Nosler 140 gr. Partitions and some select others might offer them.

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Originally Posted by CanadianLefty
Originally Posted by John_Gregori
I finally used up my supply of old factory Federal "High Energy" 140 gr. TBBCs that chrono'ed 3,078-3,102 fps in my 24" model 70. I've had great success with these on all kinds of big game.

Would you have any suggestions on how to replicate 3,100-ish fps with Northfork 140gr or 140gr TSX? If so, what velocities, bullet, which powders?

I've tried H4350 up to 54.0 gr with the TSX but only get around 2955fps; with no obvious signs of pressure. This is the max listed in the Barnes reloading manual. Barnes is able to get 3,030fps.



You might want to ask Mule Deer about this. I think there's talk of Alliant 26 powder for 150 gr. bullets that get up to 3100 FPS. . If so, you might be able to get 3200 FPS with 140 gr. bullets.

BTW, I think NorthFork discontinued their 140 gr bullets so only Nosler 140 gr. Partitions and some select others might offer them.


did you happen to notice this is a 2 year old thread?

I am sure everyone forgot it ever existed...


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