7WSM + 300WSM Need Pet Loads

[Steve Ladino]

Guys,

I'm working on a combined 7WSM and 300WSM Cartridge Guide. This will also include the 7mm and 30 Cal WSM necked up from 270 WSM brass,used by Vince Bottomley and Alan Warner).

I need your favorite accuracy loads. Please provide:

Bullet weight and Mfg.
Powder and load in grains
Cartridge OAL
Primer
Brass Mfg.
Velocity
Comments on function, brass life, accuracy

We are trying to cover both target and hunting uses of this cartridge, so please supply both types of loads, if you have them. In discussing a hunting load, you might want to comment on bullet performance on game.

Please post your loads in this FORUM thread or email mailbox@6mmBR.com . Please put "WSM LOAD" in the title of your email. Be sure to identify which cartridge and brass you're using--I sure don't want to have 7WSM loads mistaken for 300WSM.

I do not have any info on the 7MM WSM load data for the guide but I have recently dealt with Parish Davis in Mobile Alabama on a Feinwekbau 300 s . He owns and operates a business there "Extreme Rifles.com"
is His business. Via our mutual introductions and acquaintances the talk led to gunsmithing and our favorite cartridges. I shoot benchrest and he shoots / is into longer ranges. Bottom line for Him is the 7MM WSM bar none.
He is a member here and has valuable load data for the 7 MM WSM.

 

[k80skeet]

300 Win Shot Mag
180gr Nosler Partition Bullet
65.5 H4831 Powder
Federal 215M Primer
Winchester Brass
Set to max magazine length
Shoots under 1/2" 3 shot groups

300 Win Short Mag
150gr Nosler Ballistic Tip Bullet
71.0gr H4831 Powder
Federal 215M Primer
Winchester Brass
Set to factory Length 2.860
Shoot one little hole way under 1/2"

 

[whatwind?]

Anybody try rl-26 or 33 in their 7-270wsm or 7-300wsm?

It appears H1000 and rl-25 at 65 gr produce same velocities, so wonder what the new 26 would produce

 

[INTJ]

300 WSM. H4350, 64 grains, 168 Barnes TTSX, Rem cases, Fed 210 Match primers. About 3000 fps and under 3/4” groups. Clean kills on deer. One was lengthwise through a 170ish lb Blacktail at 60 yds, the other was a Blacktail forkie at 435 yds. Rifle weights 7 3/4 lbs with a Leu 3.5x10x40 in Talley LWs.

 

[ww morris]

Guys,

I'm working on a combined 7WSM and 300WSM Cartridge Guide. This will also include the 7mm and 30 Cal WSM necked up from 270 WSM brass,used by Vince Bottomley and Alan Warner).

I need your favorite accuracy loads. Please provide:

Bullet weight and Mfg.
Powder and load in grains
Cartridge OAL
Primer
Brass Mfg.
Velocity
Comments on function, brass life, accuracy

We are trying to cover both target and hunting uses of this cartridge, so please supply both types of loads, if you have them. In discussing a hunting load, you might want to comment on bullet performance on game.

Please post your loads in this FORUM thread or email mailbox@6mmBR.com . Please put "WSM LOAD" in the title of your email. Be sure to identify which cartridge and brass you're using--I sure don't want to have 7WSM loads mistaken for 300WSM.

.300wsm loads
using 155 grain hornady eld m bullets, 64 grains H-4350, cci 200 standard primers, 2.90" col. shooting out of a tikka t-3 lite three rounds measured .153" group the 4th round was out about .5"

 

[Hiwayman92]

7 WSM
175 ELD-X
65.0 grains Reloder 26
Federal 215 M
.130 jump (my gun hates these bullets any closer to the lands for some reason, but .040 works in most guns)
2,950 fps in my 26” Proof Research Sendero Light
1/2 to 3/4 MOA at 100 (not great)....but...
1/2 to 1/4 MOA out to 1,085 yards
This is the first instance where I’ve actually seen a bullet get more accurate the further you shoot it!


300 WSM
Federal Brass 68.5 Reloder 26
Norma Brass 66.3 Reloder 26
215 Berger Hybrid
COAL 3.01” in Winchester Short Action
2830 with Federal Brass
2805 with Norma Brass
CCI 250 Primers

300 WSM
Federal Brass
200 ELD-X
2.95” or so
68.6 Reloder 26
2934 FP*Lowest ES was with Winchester LRP
I ran this “cheap” “junk” Federal brass for 8-10 firings without annealing when I was first starting out. I finally pitched it after I could seat the primers with my thumb... but it still shot great.

Bertram makes good brass but it still needs weight sorted. Norma brass has been pretty unimpressive-needs full prep and is softer.

If you can’t run Lapua, Peterson, or ADG, in mummy opinion just buy a bunch of Federal or Winchester. Fully prep and weight sort, and anneal if you can. I’ve gotten the best velocity and as good or better ES with it!

 

[Nx coatings]

300wsm h4350 61gr 208eld match and 208 bthp Hornady

.010 off lands

Fc brass full prep

Lmr match fed primer
26inch barrel was getting 2850 with .5 inch at 200y from browning heavy barrel rifle

 

[370bc]

300 WSM
RL 16 66.5 grains 3265 FPS
155 Sierra Tipped Matchking
.050" of of lands. It was a disaster using Sierra's manual OAL (10 miles away from lands).
Single load only
GM216M
W-W 300 WSM brass
Factory Win model 70 Super Shadow 1-10"
3/8'' vertical x 3 5/8" Wide @ 200 yards. 10 mph variable wind.
Just developed this load. Will confirm at distance in the near future.
Confirmed at 560 yards. Vertical less than half MOA.

 

[rtatro]

300 WSM accuracy loads:

Berger 230 VLD OTM
IMR 7828ssc: 62.2 gr
2.965" (touching lands)
Norma 300 WSM, neck turned to 0.0130" (80.4gr H2O cap)
WLRM primer
2625 fps at 30F, 2651 fps at 65F, av. sd 4.5
(Warm, but on 13th loading with no dropouts yet) Annealed after each firing
Average precision (not best group) 10 x 3 shot groups at 300 yds: 0.26 moa wide x 0.37 moa high (prone bipod).

Berger 190 VLD Hunting
IMR 7828ssc: 67.3 gr
2.911" COAL (touching lands)
Norma 300 WSM, neck turned to 0.0130" (80.4gr H2O cap)
WLRM primer (Fed210M comparable accuracy and MV, but higher sd)
2926 fps at 51F, sd 9
On 14th loading no primer dropouts yet. Annealed after each firing
Av. Precision (not best group) 0.47 moa w x 0.34h 300 yds (prone bipod)

Rifle: blueprinted early 1970's Rem 700 SA, Benchmark MTU 1:10 22", McMillan A1, Nightforce NXS 5.5-22, Custom MB, Harris, tuned 40X trigger

Notes: 190 gr load has taken bull elk at 570 yds.
230 gr. Has considerably more schwack, but no opportunity to test terminal ballistics yet.

Had very accurate Berger 200 Target Hybrid load w/H4350 (61.0 gr, Norma brass, WLRM, Nosler brass but MV 2807 w/sd 12-14 so didn't see the use in this one.

Hope this is helpful to the project.

what twist rate on the barrel?

 

[graydigger]

what twist rate on the barrel?

Sorry for long delay. This is a 1:10 barrel.

 

[No i deer]

Is anybody using the hornady 225gr ELDM's in there 300wsms..??
What freebore are you using..??
I'm thinking of getting a barrel fitted with this combo in mind...
Thanks N I D

 

[Vinootz]

Too bad you didn’t do the 325wsm also

 

[JFrank]

Early stages of 270 WSM development however 58.6 gr H4831SC under the 140 grain Accubonds are looking decent at 2.850 OAL
A little follow up at 200 yards here, not bad for a light weight rifle and a bi pod

 

[WAMBO]

64grs of RL23 under a Berger 215 Hybrid lit by a Fed 210M going 2885 fps gives me 3"-5" 5 shot groups at 1K out of a Kreiger 30" 1-10" twist HV barrel screwed on a Bat M action in McMillan MBR stock.

 

[MontanaCreedmoor]

64grs of RL23 under a Berger 215 Hybrid lit by a Fed 210M going 2885 fps gives me 3"-5" 5 shot groups at 1K out of a Kreiger 30" 1-10" twist HV barrel screwed on a Bat M action in McMillan MBR stock.

WAMBO:
What seating depth on that load development? (how much of the lands did the 215 Berger’s like?)

 

[MontanaCreedmoor]

Sorry ... “how much off the lands”.... eg: what was your jump?

 

[WAMBO]

I'm at .025 off the lands.

 

[bas402]

7WSM
My custom reamer
Defiance LA
68.5 H1k/ 180gr hybrid
28” Kreiger 8.5 tw
3020fps
FGMM 215
Matched prep WW brass
Been running this same load over the last 4 barrels 12-1400 rds/barrel used in ELR comps.

 

[Stugots]

300WSM

Bat M Action
Krieger 29.5" MTU Barrel
McMillan Kestros stock
300 Nosler Brass
Federal 215 Magnum Primer
60.6grs H4350 Just touching the lands
1.75" C to C - 5 shot group at 600 yards.

 

[DirtySteve]

300WSM

Bat M Action
Krieger 29.5" MTU Barrel
McMillan Kestros stock
300 Nosler Brass
Federal 215 Magnum Primer
60.6grs H4350 Just touching the lands
1.75" C to C - 5 shot group at 600 yards.

What bullet?