Looking for some actually measured velocities for the 257Wby and 264Wmag. If you have any please list barrel lenght, bullet and powder type. I have some for the 264 but very little for the 257.
As usual just my $.02 Paul K
Posts: 12881 | Location: Mexico, MO | Registered: 02 April 2001
The 87gr bullet goes 3779 fps, 100gr bullet goes 3530fps, The 117gr bullet goes 3323fps, The 120gr bullet goes 3365fps. Barrel lenght 26" I use RL25 power except the 87gr bullet I use RL22 for it.
Posts: 2209 | Location: Delaware | Registered: 20 December 2002
.257 Wby, 25" barrel, RL 22 (forget charge), Norma/Weatherby cases, Fed 215 Mag primer, 100 grs TSX, 3560 fps. This load is fairly hard on the brass - Norma brass is not known to handle pressure all that well.
- mike
********************* The rifle is a noble weapon... It entices its bearer into primeval forests, into mountains and deserts untenanted by man. - Horace Kephart
Posts: 6653 | Location: Switzerland | Registered: 11 March 2002
For the 257 Wby in a 24 inch barrel I am getting 3500 to 3610 with factory 100 grain TSX and Spire points. Handloaded 100 grain TSX using a non max load I have recored 3450 to 3490 using IMR-7828.
Ken....
"The trouble with our liberal friends is not that they are ignorant, but that they know so much that isn't so. " - Ronald Reagan
A 100 gr partition at 3,600 fps+/- from a 257 wby is hard to beat. w/ 200 yd zero and .377 bc, bullet is .8" high at 100 yds. -4.6" @ 300 yds., -13.7 @ 400 yds. It kills hogs and deer DRT. GWB
Posts: 23752 | Location: Pearland, Tx,, USA | Registered: 10 September 2001
My Hart barreled 264 does 3800 with 100gr BTs or Partions and +3500 with the 120s and it is super accurate. It will beat a .257 WBY with any and all bullets.
Had a .257 Vanguard that shot GREAT (under 1/2") with 73 grs. RL-22, 100 TSX, chrono 3580fps, 24". Had the barrel removed and installed on a custom Ruger #3 single shot. Super little rifle!
Posts: 688 | Location: Arizona | Registered: 21 May 2009
Gentlemen, In the above data are you mostly using mag primers or standard primers. I recently purchased a new 700 in .264 and experienced a delayed fire(click bang) w/ standard primers. When I dry fire the weapon every thing seems to be in working order, so I don't believe it is an equipment malfunction. I have a theory that it may be a primer thing.
Thanx,Matt
Posts: 99 | Location: Hudson Valley | Registered: 12 February 2004
I've loaded more 264s with 4831 but have also loaded MRP (basically RL22) I have used both std and magnum primers. I ended up using the std because in the rifle I was loading for I got more consistant velocity. I don't know what powder you are using but I have never had an issue of setting of 70grs of powder with a std primer.
As usual just my $.02 Paul K
Posts: 12881 | Location: Mexico, MO | Registered: 02 April 2001
mho..........."I forget powder weight" is an unacceptable reply! Geedubya, "He'd a been a good'un next year!!" Sorry folks!! Just having a little Saturday night fun!! Charlie (GHD)
Groundhog Devastation(GHD)
Posts: 2495 | Location: SW. VA | Registered: 29 July 2002
Bohica, I am presently loading for my .264 mag as well with H-870 and was curious if your load of 75.3 gr was correct as my hodgdon # 24 manual lists 73.0 gr max for the 140gr bullet.
quote:
Originally posted by Bohica: 264 Win Mag 75.3/H-870-140 Sierra Gameking=3120 23" McGowan
Dear Huff, Yes it is correct. This load is safe in MY Remington but I would apprach with care in yours. I also use a 1-10 twist so it reduces pressures a bit more too. I have to use a drop tube with standard 264 brass but not with resized 7mm RM brass. Go figure? The really nice thing about H-870 is it is a ball powder--easy to meter and easier on the bore than the extruded type. It might be hard to find now but I got a couple of 8# cannisters a few years ago so I am set for life. Aloha, Mark
When the fear of death is no longer a concern----the Rules of War change!!
Posts: 978 | Location: S Oregon | Registered: 06 March 2004
