7 stw accubond load help

[dale thames]

does anyone have any good ideas where to start ? I am starting to work up a load for my sako 7 stw w/26" barrel. I plan to use 150gr Nosler Accubond. Any idea what the velosities are ? Thanks

 

[dakor]

I think you either mean the 140 grain or 160 grain Accubond I do not think they make a 150 grain yet. The 140 Accubonds I am shooting them with 80 grains of R-22 at 3426 FPS with about a 3/4 inch group at 100yards. The 160 Accubond I am shooting 77 grains of R-22 at 3256 FPS with a 1/2 inch group at 100 yards. Reduce both loads by 3 grains and work your way up a half grain at a time. My rifle is a stock Rem 700 Sendero.

[ 11-01-2004: Message edited by: dakor ]

 

[dale thames]

Dakor... Do you hunt with these loads? I am having only marginal sucess with Partitions (1-1/2" @ 100 yds). Great bullit, but looking for tighter groups and great performance! Z-28

 

[dakor]

I have not killed anything with them yet but I will be over the next few weeks. I did test them by shooting them at 15 yards and at 60 yards through wet text books and lots of wood and they held around 60% of their weight just like a Partition would. The 140 grain I will use for deer and mid size game and the 160 grain I would use for Elk and Moose and not think twice about it.

 

[Varmint Hunter]

I'm shooting 74.0gr IMR 7828 under the 160gr Accubond bullet. Shoots .5"-.6" and chrono's @ 3,150 from my 26" barrel

They probably could be shot a bit faster but this is were the accuracy lies in my rifle.

 

[budlight]

These IMO are very light loads. I use IMR 7828 and H1000 for my 175 SBT's and exceed 3100 fps with accurate loads.

RIFLE DATA
NEVER Exceed the Loads Listed Here

To print, click here, then click the Print button on your browser program.


--------------------------------------------------------------------------------

BULLET POWDER GR VEL CUP

--------------------------------------------------------------------------------

7MM SHOOTING TIMES WESTERNER
CASE: FEDERAL

BBL: 24"
PR: FEDERAL 215



120 GR. SPR SP
COL: 3.585"

RETUMBO 89.5C 3519 54,300 CUP


139 GR. HDY SPBT
COL: 3.565"

RETUMBO 88.0C 3347 54,300 CUP


145 GR. SPR SP
COL: 3.565"

RETUMBO 81.5C 3195 53,700 CUP
H1000 77.0 3120 52,100 CUP
H4831 72.0 3063 52,300 CUP


150 GR. BAR XFB
COL: 3.585"

RETUMBO 77.0C 3036 53,000 CUP


160 GR. SFT SP
COL: 3.565"

H50BMG 90.0 C 2970 46,600 CUP
H5010 86.0 C 2877 45,700 CUP
H870 90.0 3097 46,100 CUP
RETUMBO 80.2 3056 53,600 CUP
H1000 80.7 3084 51,500 CUP
H4831 74.0 3037 52,300 CUP


175 GR. NOS PART
COL: 3.585"

H50BMG 89.0 C 2973 52,300 CUP
H5010 85.0 C 2921 51,600 CUP
H870 89.0 3059 51,800 CUP
RETUMBO 77.0 2967 54,200 CUP
H1000 74.0 2944 51,900 CUP


C = Compressed Charge

 

[dakor]

From what I have found is R-22 will give the best velocity in the 7mm STW. The only other powders I have found that come close is H-1000 and IMR-7828 but R-22 still had an average of 50fps faster with the same bullet weights over the other two I mentioned. Alot of data out there really down loads the STW. The best manual I have found that really comes close to what the cartridge can do is the Sierra manuals.

[ 11-03-2004: Message edited by: dakor ]

 

[COBrad]

RE: z28, I have a .300 that shot around 2.5" @ 100 yds with Nosler partitions, but with the same load shot 1" with Sierra Gamekings. I'm currently using Accubonds with the same 1" accuracy. If I load Matchkings to the lands, this rifle has shot in the .5's. I like N. partitions, but I've only had one rifle that liked them.