I came up with a load for a buddy's 25-06 using the 117gr Hornady SST & 50gr of Reloader 22. I surprised at the velocity this load produced out of 2 of his rifles. We got 3000fps + out of his Stevens & 3200fps out of his Savage model 12BVSS. No pressure signs were evident out of either rifle.
According to the Hornady 6th edition manual, this load should have produced about 2800fps. The max charge weight listed in this manual is 56.1gr. The Sierra manual listed a max load of 50.5gr for their 117gr bullet.
He has taken 3 deer with this load at 273 yards & 310 yards.
I just thought I would share this & see what everyone thought about this combination.

First thing I would do is check my Chrono.

+1 to ramrod340.

I load the 117gr SST in my 257WBY with 66.5gr RL25, and the chrono tells me they are running at 3249fps.

It is a great bullet for the 25 calibers though.

Is the chrongraph a Chrony?
If so, was it opened all the way?
Did you confirm those velocities on two different days?
What was the temperature? Velocities will be much different at 100 degrees then at 60 degrees.

According to some of my old data, you are running right around 2880fps, depending on barrel length, and the elevation you are shooting at.

Yes, my chronograph is a Chrony & it was opened completely. The temperature was 52 degrees, the barometric pressure was 29.16"hg, the corrected elevation was 711' on that day, & the humidity was 82%. We fired a 243 with a 70gr ballistic tip load that gave us velocities of 3000fps & an AR with an 18" barrel. Shooting some factory loaded ammo, I do not recall the bullet weight at this time. The velocities for the 223 were in the 2400fps range.
Sonofa B I expected to see velocities in the 2600 to 2800fps range myself. I was very surprised when the 3000 & 3200fps popped up on the display.
Antelope Sniper, We have not had the chance to confirm yet & may not have another chance until February.
I thought these velosities were on the high side myself. That is why I thought I would throw this out & see what everyone else thought about it.
I have a buddy that has a different Chrony. Would it be good to shoot over his Chrony the second time around & see what we get?

Try the other chrony, you have nothing to lose. I sometimes get crazy velocities off of mine, but I think it only happens when the batteries are weak, or if I didn't open it all the way.

Good luck there, let us know.

I see a 200fps difference in velocities between makes of firearms on your OP. What are the barrel lengths?

Sometimes the light of the sun
can wreak havoc on my readings as well. I get the best data on a cloudy day.

Good luck.

The Stevens has a 22" barrel & the model 12 has a 26" barrel.
We had a an overcast day when we shot these over the chronograph. The battery has been in the chrony for a while so it probably wouldn't hurt to change it. I guess we will find out when we shoot these again. I appreciate all of the help.

I don't think that you are getting erroneous readings from your chrony.
I get 3030fps with Sierra 117gr BTSP and close to 3200 with 115gr BT's, not a great difference in bullet weight, but shape plays a big part in the velocity equation.
All of my loads are developed with the Pressure Trace II system, and the pressure for both bullets are practically identical, only the charge weights and velocities differ.

I do agree that some chrony's give erroneous readings in bright sunshine, even with the diffusers in place, but whenever mine have done it, it's been a huge difference in what was expected.

Just my .02cents

quote:

I get 3030fps with Sierra 117gr BTSP and close to 3200 with 115gr BT's, not a great difference in bullet weight, but shape plays a big part in the velocity equation.
All of my loads are developed with the Pressure Trace II system, and the pressure for both bullets are practically identical, only the charge weights and velocities differ

While I have no issue with 3000-3200fps with a 117 from a 25-06 doing it with only 50grs of rl22 is the question.

His 4" difference in barrel will account for 100-150fps of his difference.

That's true ramrod340 the question is doing it with only 50gr of powder. This past weekend I started working up a load for my 25-06 ruger varmint with a 26" barrel.
It took 52.6gr of relaoder 22 to reach 3042fps with a 117gr bullet. This sounds more realistic to me. I am still planning to shoot my friends rifles again with the load in question & see if it's different.

quote:

It took 52.6gr of relaoder 22 to reach 3042fps with a 117gr bullet

In the what's it worth department. QL calls that load with a 117gr SST from a 26" 3005fps.

thanks ramrod340, I appreciate you running that on QL for me.

quote:

thanks ramrod340

quote:

Originally posted by ramrod340:

While I have no issue with 3000-3200fps with a 117 from a 25-06 doing it with only 50grs of rl22 is the question.

.

Thats an astute observaton. I get 2950-3000 fs with a 115 gn BT from my 257 AI, so getting the same from a 25-06 should be no problem at all. If you are getting there with only 50 gns of powder then I'd say keep on grinin, youve got a nice load!!

Ive not used RLR 22 at all, but Ive heard of huge variations from lot to lot. Maybe your lot is at the quick end??

Well, whatever speed they are running at they seem to work pretty good. Here is a picture of a yote that I took with my 257WBY and the 117SST.

Have fun!

Nice yote!