Home Forums Hunting & Shooting Ask The Gunwriters Any safe way to get a 270 Win. @3150fps with a 140gr. TSX and 22" barrel?

Thanks!

This is great information, keep the outpouring of results and facts coming!

Have you ever measured any factory 130gr across your kronijeraph?

BTW don't tell the deer your loads don't make 3K and it won't make any difference, 2900 is plenty...

For whatever this is worth and it might not be much I will relate yesterdays chronograph experience. I noticed in this thread comments regarding fiddling with the chronograph to get whatever velocity you want. I just got anew ProChrono and I have been working on some 25 WSSM loads. I had the factory 120 PEP ammunition which chronographed at 2,880 out of both a Browning A Bolt and a Winchester 70. I started by fiddling with the angle of the bore and its relationship to the surface of the chronograph. They need to be parallel when the trigger is squeezed. I ran a couple of shots with the chronograph angled sharply away from my shooting position. The bullet was pretty close to the fron sensor and quite aways. maybe 18" or so from the rear sensor. The two shots I fired this way read 4,549 and 4,555. Obvoiusly these two shots have no relation to reality. What it illustrates is, that the above posters who remarked that you can fiddle with your chronograph and alter your data are right. Be sure you keep the plane of the bore parrallel to the plane of the chronograph sensors or your result may be full of stuffing. It wouldn't take much of an angle change to induce a reading of 150 fps that were not there.

Steve

On the other hand I have not one, but two 270s, a Husqvarna with a 22" barrel and an FN with a 24" that get more than the velocity shown in the reloading manuals with the loads listed.

The really amazing thing is that the 22" Husqvarna is only a few feet shy of matching the FN with its longer barrel.

Ted

Ruger280, somehow, the deer figured it out. The 130 grain was Sierra pointed soft points. On deer in the 100 pound range, I never had one penetrate on a broadside shot. Most deer in the area I hunt are shot at 30 to 50 yards, and none dropped in their tracks. They didn't go far, and there was usually no blood trail at all.

I just followed in the direction they went, and luckily, they didn't go far. Now, I use 140 grain Nosler partition, and they do penetrate. I don't know the velocity. The deer still run a few yards, 40 or 50 usually, (I don't try for neck or head shots. Just the heart-lung area.) but usually there is a small blood trail.

You might think that a deer going 40 or 50 yards is no big deal, and a lot of times, it isn't, but in the area where I hunt, it is so thick a deer can be out of sight in one or two leaps. That is why I want complete penetration, and as much of a blood trail as I can get.

Strange that you ask about testing the 130 grain factory load. Actually, I never even thought about it because I haven't shot a factory load in that rifle in over 40 years. I don't even have any.

This past year I picked up a Tikka T3 Lite in 270 WIN (22" bbl). During my load developement, I immediately found that my tried and true "pet loads" that developed for my Rem M700 in 270 WIN (22" bbl) were WAY TO HOT for the Tikka.
With the M700 I settled on a load that was giving me 3025 fps with a Seirra 130gr SPBT.
With the T3 I found that the sweet spot load was 2950 fps using the same bullet. My conclusion with the Tikka was that it had a tigher chamber and/or bore as compared to the Remington.
I would recomend that you not fuss over an extra 150 fps, choosing instead to develope a load that will litterally drive tacks.
Good luck and enjoy your time on the range.

I hear you. The partition is a great bullet at most any velocity. I was really getting at the velocity being the variable not the bullet. Shoot that 140gr partition at some muzzle velocity between 2600 and 3000fps into the boiler room and there won't be a hill of beans difference in the end. Except maybe at extreme ranges.

I'm with you on the factories....I have never personally bought factory loaded ammo for a rifle believe it or not. Never intend to either.

I was able to get better velocity with 150 gr bullets; close to below from Alliant:http://www.alliantpowder.com/reloaders/RecipePrint.aspx?gtypeid=2&weight=150&shellid=64&bulletid=181&bdid=1302

Speer 150 gr BTSP; Reloder 26 67.6 3,113FPS

Unless you are doing the development yourself you just don't know what is up.

I once loaded some 140 270's for a fellow who wanted the 3,150 fps. At that time I had no 270's I loaded for, but had some 140 bullets that were in the way. He gave me some brass and I loaded them.

I worked up the load as if I were doing it for myself, but using his rifle. The safe point was just under 3,000. Ran some factory 7mm RM over my chrono. Those loads ran about 3,150. Took a picture of the readout on the display, loaded them up, labelled them as 3,150, included the photo. He was happy as a clam.

Another vote for R26.
From the Alliant data in a 24" barrel:
270 Win. Sierra 150 gr SBT Federal 3.23 24 Fed 210 Reloder 26 60.2 3,037 -
270 Win. Nosler 150 gr Partition Federal 3.23 24 Fed 210 Reloder 26 60.8 3,022 -
270 Win. Speer 150 gr BTSP Winchester 3.2 24 Fed 210 Reloder 26 60.4 3,034 -

Looks like R26 could get close or at least to 3,000 with the 140s and a 22" barrel.

Quickload shows R26 will get you closest. It shows approx 3130 @ 66k psi. The next closest powders are R25 and MRP at approx 3100.

If you're trying to get as much as you can safely, start low with R26 and work up to what is max for your setup.

Your mate from the range with the 22" bbl is closer to 70k PSI than he is to 65k.

yes WSM or ROY....Win=kaboom!

LC