.300wm - .300wsm

alaskalanche

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Dec 22, 2017
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Yes, the long bullets won’t be seated optimally. The short mags really come into their own when they can be seated out in a medium or long action. I’ve realized this myself with a 7 SAUM.
That being said, I am putting together a multi-barrel short action hunter for 223, 6.5, and 300 WSM. While I know the 300 wsm will be a bit held back, I’d love to see how much ground can be made back up with R26?? If you can get it over 2800 in a 22-24” barrel, then I think it will really perform.

Anyone using R26 in short action 300 wsm?

Yes sir,

I am getting 212 eldx at 2875 fps and 208 ELDM at 2930 fps out of my 22” 300wsm with RL-26. The 208s shot just slightly better so I will likley be going that route.
 

918v

Sporadic Achiever
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Minuteman
Jul 15, 2007
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I had 5 boxes of Hornady 225gr ELD M projectiles and I noticed the bullets in 1 of the 5 boxes were noticeably different. Looking at the lot numbers on the 5 boxes, the oldest is the different one.

Ogive, boat tail length, boattail taper and tip material are all different. I loaded a few and had to adjust seating depth until the same CBTO was achieved. The resulting COAL was visibly different I'll shoot them at short range < 350 yards as I'm sure the visible differences would yield practical B.C. and trajectory differences at long range. They obviously changed the design at some point. As sensitive to theses bullets are to jump distance (for my rifle anyway), I hope they still shoot ok at the same CBTO. Pisses me off as they aren't cheap and I don't appreciate the variability.

Could u post a pic of both projectiles side by side so we can see the shank length?
 

THE SENTINEL

Sergeant
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Apr 7, 2005
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Question about Norma 300 win mag brass.I ran it through full length size and the case head is still sticking out of my hornady case gauge .010
I am using Reeding dies.Do I need a small base die.I bought the brass used
 

joblo

Private
Minuteman
Jun 8, 2019
19
25
Re: Loads for .300WM--.300WSM

.300 Win Mag - GAP / 24" Rock / SRT Mag Shadow

Berger 210 VLD / fully prep'ed Win brass / Fed 215M / OAL 3.5" / 72.0 RE22 / 10 round average - 2916 FPS SD 12.1, ES 39 / 42.6 degrees / 90.6% RH. Sub 1/2 MOA load.

Redding Dies - headspace value setting (as determined by RCBS Precision Mic) = -.0041 / .331 bushing

Thanks to Chad - max with RE22 and 210 VLDs is 71.1
Thanks to Rob01 for set up infor


Good luck
Re: Loads for .300WM--.300WSM

.300 Win Mag - GAP / 24" Rock / SRT Mag Shadow

Berger 210 VLD / fully prep'ed Win brass / Fed 215M / OAL 3.5" / 72.0 RE22 / 10 round average - 2916 FPS SD 12.1, ES 39 / 42.6 degrees / 90.6% RH. Sub 1/2 MOA load.

Redding Dies - headspace value setting (as determined by RCBS Precision Mic) = -.0041 / .331 bushing

Thanks to Chad - max with RE22 and 210 VLDs is 71.1
Thanks to Rob01 for set up infor


Good luck
factory Sako finnlight 85 .300wsm
200 gen accubond 69grn 7828ssc
Win brass ccw primers at 2.910 oal
Around 2890fps
 

TriggerHappy0125

Private
Minuteman
Apr 5, 2019
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47
#1
Just picked up a bergara hmr 300wm, wondering if anyone has been reloading for it, if so what loads work good. Looking to take it past 1000 once I get a load worked up
Thanks
Has you got a load developed? I am working with that rifle as well. I am working with H1000 180 grain AB.
 

eagleskier

Sergeant
PX Member
Minuteman
Jul 9, 2010
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H'ville, AL
can someone make a separate page for 300wsm!!
this is ridiculous.
Half of the loads don't say if they are WM or WSM.
looking for 200, 212 eld WSM loads
I'm with you buddy. I have 2 300 WSM's and it would be a lot easier if they were separated. A lot safer as well.
 

lance2121

Private
PX Member
Minuteman
Oct 28, 2012
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southwest mo
300 win mag. Nosler brass. 215 Berger hybrids. 77.9 gr h1000. Cci 250 primers. 2943 fps. Sd of 4.2. 28 inch bartlein 10 twist. No pressure and shoots bugholes.
 

SkyScrapin

LGOWI
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Jan 31, 2010
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Anybody have data on 20” 10 twist 300wm and 155g hybrids? I have 100 to test in a custom hunting rifle but I’m not real sure what powder would be best. Thinking H4831sc or possibly H4350. I have most powders in inventory, but prefer extreme powders.

I’m running out of barrel length quickly using 215g Hybrids and H1000 flying around 2660-2700fps.
 

SkyScrapin

LGOWI
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Jan 31, 2010
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Anybody have data on 20” 10 twist 300wm and 155g hybrids? I have 100 to test in a custom hunting rifle but I’m not real sure what powder would be best. Thinking H4831sc or possibly H4350. I have most powders in inventory, but prefer extreme powders.

I’m running out of barrel length quickly using 215g Hybrids and H1000 flying around 2660-2700fps.
Pulling this up to the top 1 more time for the 3hunnit fans.
 

Scottifly

Private
Minuteman
Aug 3, 2018
6
0
Hey guys. Just bought a new Winchester XPR 300 WM and doesn't look like I'll be able to load over SAAMI length due to a short magazine. Seems to be the same with my buddy's Browning 300 WM.

Anyway, looking for a place to start load development. This will be an elk rifle so looking to load 190-210 grain Noslers or Hornady ELD-X bullets. I'd like to stick with a temperature stable powder if possible.

Any input would be appreciated.
 

Ankeny

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Aug 11, 2009
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FWIW, been working up loads for a 300 Win Mag. I know every rifle is different. Mine loves RL 23 with the 190 Berger. I am getting very low SDs with RL 23 using bullets in the 178-190 grain weights. Much better than H 1000.
 

NCHillbilly

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Jul 7, 2012
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I haven't seen anything in this thread about anyone using the 225 eld's for 300WM. Anybody have any experience with these? I like heavies in most of the calibers I shoot and am thinking of trying these. I know they won't be the fastest load for this caliber, but sure ought'a carry some serious energy quite a distance.
 

Bigwheels

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    I have 1500 ELDM 225s down the pipe in my Benchmark 9.5 tw 28" tube. .015" jump with 74.1-74.5gr H1k depending on lot. 2800fps.
    They put 1hole groups @ 100 & under favorable conditions I've gone 7/10 rnds at a mile with them.
     

    NCHillbilly

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    Thanks. I have a new RPR that I have yet to put any rounds through. I'm planning on testing 190 gr thru 225 gr rds to see if it prefers any of those, but I have high hopes for the 225 eldm's. I was always a fan of the a-max's in some other rifles, and it's my understanding that the eldm's are an improvement on those. Fingers crossed.
     

    gearguywb

    Gunny Sergeant
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    Mar 17, 2018
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    Going to place a powder order today. Have been using H1000 in my 300. Any other suggestions as to what to grab?
     
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    Scottifly

    Private
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    Aug 3, 2018
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    I recently bought a 300 WM and finally found a load it really likes. Tried H4350, H4831SC, and H1000 with 180 grain Accubonds. H1000 turned out to be the best by far.

    78.3 grains gets 3000 fps with an ES of 4, an SD of 2, and 0.6" groups.
     

    aamity

    Private
    Minuteman
    May 1, 2020
    20
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    Elko, NV
    RPR 300 WM. Factory 26” 1:9 barrel.
    208gr ELDMs
    67gr H100V
    Fed 215M
    Virgin PPU brass
    COAL 3.590 (.020 off lands)
    2900 FPS
    .75” at 100 yards
     

    JBarton

    Sergeant of the Hide
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    Jun 1, 2020
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    Wyoming
    300WM
    26" 9 twist bartlein on a trued 700 action in an element chassis.
    200gr ELDX
    71.5gr H4831sc , hornady case, federal large magnum match primers
    OAL: 3.519" at 0.015" off the lands.
    2878 fps with an average ES of 8.
    Average group at 200 yards is just under an inch when i do my part. Can keep it under 0.500" at 100 yards.
    See picture of factory load next to my hand load.
    I have tried IMR 4955 with fair results.
    Ramshot magnum was not to good with temp swings.
    RE17 was all over the place and dirty.20200822_172054.jpg
     
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    Wlfdg

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    Sep 26, 2008
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    Jackson, WY
    Factory Savage 110 Long Range Hunter .300WM 26" barrel 1/10 twist
    Berger 215 Hybrids .080 off lands
    Norma brass
    75.2gr H1000
    215M primers
    ES - 15
    SD - 5.2
    Avg - 2891fps.
     
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    mmlj

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    Jul 22, 2011
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    300 WSM Hunting Load:

    Browning A Bolt II, SS 300 WSM, 1/10 Twist
    Win. 300 WSM Brass
    68 gr. IMR 4831
    Barnes 168gr. TSX
    OL 2.8815"
    Lee Factory Crimp Die
    Avg Velocity, 3,190 fps
     

    NCHillbilly

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    I've been back and forth and in and out of this thread all year, and can't remember seeing any load info on the nosler 210gr rdf. Anyone tried this bullet in a 300wm yet?