Need load experience with 160 gr Accubonds and 7STW Please.

[odavid]

I am currently developing loads for my 7 mm STW. Mine is a Ruger #1 with a 28 inch Kreiger barrel. I have several 160 Accubonds bullets and various powders to try. Do you have any starting points or preferred loads?

I will not start at your developed point but build up slowly watching the FPS and pressure signs for limiting points.

Has anyone noticed a preferred point from the lands your rifle likes. I know each rifle is different but a starting point would be interesting to note.

I would like to get close to 3500 fps if possible with the 160 accubonds in my 7STW.

THANK YOU FOR THE HELP
ODAVID

 

[Ridge_Runner]

mine has a 26" lilja on it. I load 94 gr of WC872 behind the 160 accubonds for 3340 fps. 3500 fps would really be smoking in an STW, don't think it'll make it without pushing it very hard.
RR

 

[JD338]

odavid,

Welcome to the forum.

Here is a starting point for you-

http://www.nosler.com/index.php?p=15&b=7mm&s=278

http://www.reloadersnest.com/query_bw.a ... Weight=160

I think 3500 fps might be tough to do within safe pressure limits.

JD338

 

[tjRoberts]

Has a 26 inch tube,
It shoots the 160 acubond extreamly well with RL-25 IMR 7828 and startelingly well with H-1000.
I have shot groups you simply would not believe with the last powder.
I have gotten near 3300 fps.
If you can get 3350 or so with you #1 you sould be very happy.
A *1 is a very strong action, but you are getting into risky teitory for very little real world gain.
If you want 3500 , I would recomend you see if you have enough steel to rebore your barrel, to the .378 weatherby case.
7mm X378 weatherby should give you enough powder space, but would you have enough steel left to hold the preasure ?
who knows...tj3006

 

[odavid]

I realize 3500 is too steep of a goal and probably obtainable only with a great price if even then achievable.

Has anyone noticed a preferred point from the lands the accubonds like??? I know each rifle is different but a starting point would be interesting to note.

thanks again
odavid

 

[FOTIS]

Drop 10% and work up

Cartridge : 7 mm STW
Bullet : .284, 160, Nosler AccuBond 54932
Cartridge O.A.L. L6: 3.650 inch or 92.71 mm
Barrel Length : 28.0 inch or 711.2 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 64000 psi, or 441 MPa

or a maximum loading ratio or filling of 105 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

156 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
ADI AR 2218 104.6 89.8 5.82 3333 99.9 64000 14312 1.284 ! Near Maximum !
Vihtavuori N570 100.3 85.2 5.52 3290 99.5 64000 14033 1.314 ! Near Maximum !
Hodgdon Retumbo 104.4 84.6 5.48 3227 100.0 64000 12054 1.309 ! Near Maximum !
Vihtavuori N560 92.3 76.1 4.93 3221 100.0 64000 12530 1.307 ! Near Maximum !
Accurate MAGPRO 92.5 79.3 5.14 3217 99.9 64000 12743 1.317 ! Near Maximum !
Hodgdon H870 105.0 87.4 5.66 3214 99.9 61067 13320 1.350 ! Near Maximum !
Norma MRP 2 99.6 80.3 5.20 3212 100.0 64000 12372 1.324 ! Near Maximum !
Ramshot Magnum (Big Boy) 94.9 81.5 5.28 3209 100.0 64000 12169 1.312 ! Near Maximum !
IMR 7828 SSC 91.3 75.6 4.90 3209 100.0 64000 12097 1.298 ! Near Maximum !
IMR 7828 96.5 75.6 4.90 3209 100.0 64000 12097 1.298 ! Near Maximum !
PB Clermont PCL 517 94.8 81.6 5.29 3208 100.0 64000 12158 1.312 ! Near Maximum !
SNPE Vectan SP 12 94.6 81.5 5.28 3207 100.0 64000 12130 1.313 ! Near Maximum !
ADI AR 2213 92.6 75.4 4.89 3200 100.0 64000 12048 1.294 ! Near Maximum !
Norma MRP 90.4 76.1 4.93 3199 100.0 64000 11970 1.319 ! Near Maximum !
Vihtavuori 24N41 103.4 88.8 5.76 3197 96.1 64000 13137 1.302 ! Near Maximum !
ADI AP 2214 96.2 80.5 5.22 3195 100.0 64000 11800 1.296 ! Near Maximum !
Hodgdon H1000 101.1 80.7 5.23 3193 100.0 64000 11766 1.296 ! Near Maximum !
Alliant Reloder-22 92.7 75.5 4.89 3186 100.0 64000 11907 1.314 ! Near Maximum !
Bofors RP5/NP ~approximation 92.7 75.5 4.89 3186 100.0 64000 11907 1.314 ! Near Maximum !
Raufoss RA15 92.7 75.5 4.89 3186 100.0 64000 11907 1.314 ! Near Maximum !
Winchester WXR 95.2 75.9 4.92 3185 100.0 64000 11929 1.314 ! Near Maximum !
Hodgdon US 869 105.0 90.2 5.84 3185 99.2 60063 13220 1.347 ! Near Maximum !
Alliant Reloder-25 97.4 78.1 5.06 3182 100.0 64000 11507 1.315 ! Near Maximum !
Rottweil R905 94.1 75.3 4.88 3170 100.0 64000 11824 1.310 ! Near Maximum !
Alliant Reloder-19 90.4 72.9 4.72 3152 100.0 64000 11450 1.303 ! Near Maximum !
Hodgdon H4831 96.4 75.5 4.89 3147 100.0 64000 11626 1.301 ! Near Maximum !
Hodgdon H4831 SC 92.6 75.5 4.89 3147 100.0 64000 11626 1.301 ! Near Maximum !
Bofors RP14 ~approximation 91.1 73.4 4.76 3146 100.0 64000 11371 1.304 ! Near Maximum !
Vihtavuori N170 104.2 83.1 5.38 3140 98.7 64000 12202 1.325 ! Near Maximum !
IMR 4350 90.7 70.1 4.54 3131 100.0 64000 11205 1.299 ! Near Maximum !
Somchem S385 90.5 73.8 4.78 3106 100.0 64000 10869 1.325 ! Near Maximum !
IMR 4831 92.9 71.7 4.65 3101 100.0 64000 10671 1.326 ! Near Maximum !
Vihtavuori N160 96.0 74.2 4.81 3097 100.0 64000 10854 1.305 ! Near Maximum !
Vihtavuori N165 95.4 76.1 4.93 3091 100.0 64000 10635 1.318 ! Near Maximum !

 

[Antelope_Sniper]

David, check you PM.
My barrel is a little longer then your, at 30". I was only able to achieve 3375-3400 with my 26", so 3500 might be a little out of reach for a 28", but you should still be able to make the antelope quiver with fear from a verrrry long range. :grin:

 

[JD338]

The 7mm STW at 3300 fps with a 160 gr AB is one flat shooter. With a 300 yd zero, you can hold on hair past 400 yds.
http://www.biggameinfo.com/index.aspx?p ... lcadv.ascx

JD338

 

[bobbyrum]

odavid, welcome :grin: I agree with JD338, only us guys with 7mm RUMs get close to 3500 ft./sec. Best I got was 3450 in my RUM with 160 AB. Don't be afraid to try Retumbo or H50BMG. Mine loves H50BMG & 10 off touch. Just don't do what I did yesterday on my deer & pull your shot. The gut absolutely exploded! Fortunately I was able to clean out the mess quickly & the loss was minimal. Got a little too cocky & didn't concentrate :roll: Enjoy your STW. I think 160 AB or NP will rock in your STW

 

[Antelope_Sniper]

Yep, I hit an antelope this year on a quartering shot that went throught he guts. BLEW HALF DIGESTED GRASS SIX FEET OUT THE BACK OF IT.
Needless to say, it was DRT.

 

[jtoews80]

Kirby Allen's 277 Allen Mag or 7mm Allen Mag would likely get you to 3500 with a 7mm 160 grn. Although, whether the 150-200FPS is worth that much money, bout the cheapest way to build one would be one a Mark V WBY in a 378 bolt face. THat isn't a cheap proposition, but it sounds fun :grin: Most sane people choose a RUM or STW.

CC.