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Anyone ever chrono 300 WSM?

 
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  #8  
Old 01-22-2008, 12:36 PM
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Originally Posted by goodgrouper View Post
I see that factory loaded 300 WSM are supposedly pushing 180 grain bullets at 2950 fps up to 3050 fps. Anyone confirm this with a decent chronograph?

I find these velocities hard to believe with these bullets stuffed down almost to the primer to make them fit in any magazine.
GG,

My brother's 24" barreled 300 WSM average 2915 over Oehler 33 with Winchester Supreme 180 CT's. About 40-50 degrees. Not quite what was advertised on the box.

My theory is that the factory has to take into account folks shooting in 110 F weather, etc. and so maybe at those temps, you'd see 3000fps?

Jon
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Old 01-22-2008, 02:06 PM
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A glorified 06 is just what I call the round. Here's the data, 64 grains H 4350, WLR primer seated to 2.86. Average was 2931 with a sd of 11 and es of 23. This was the best I could get but it did shoot 1/2 MOA for a sraight factory stick with different shooters which is how I like to determine if my loads are good enough. Dave
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Old 01-22-2008, 03:52 PM
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Three of us running either 210 JLK or Bergers at 2975-3050 with MRP and F210s out of 30" barrels measured over Oehler 35 with 4 ft spacing which is accurate to less than .5% according to Oehler. Plus winning matches too.

Most in 1k BR game are running the 210s at 2850 and up to 2950 in the WSM.

BH
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  #11  
Old 01-22-2008, 06:24 PM
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I have had no trouble reaching over 3000 fps with a 180 in a 300 wsm. I am not shooting factory ammo or a stock rifle. 26" 10 twist Lilja, blue printed remington sa. I did allot of testing with the 180 ballistic tips and 178 a max. I settled on a healthy charge of IMR4831, norma brass, federal gmm mag primers and the 178 a max. Average velocity is 3140 fps and accuracy is well under .5 moa.
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Old 01-22-2008, 07:44 PM
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Im not sure what the factory mag length is or what the OAL of the cartridge is when loaded to fit the factory mag,but if the 180s are being seated pretty deep chances are its not going to reach its potential velocity.As BH stated I have no problems reaching 3000 with 180s and a little above 2800 with 210s,and thats with a 300saum,but again its not loaded to magazine dimensions and the chamber isnt factory.
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Old 01-22-2008, 09:51 PM
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Originally Posted by BountyHunter View Post
Three of us running either 210 JLK or Bergers at 2975-3050 with MRP and F210s out of 30" barrels measured over Oehler 35 with 4 ft spacing which is accurate to less than .5% according to Oehler. Plus winning matches too.

Most in 1k BR game are running the 210s at 2850 and up to 2950 in the WSM.

BH


Thanks everyone for your answers. For those of you who are getting near 3000 fps with a 180, are you fitting the magazine? And if so, how compressed is the load with around 66 grains of stick powders? I have now tried winchester and Norma brass and I can't get 66 grains of ANY stick powder in the case without the powder impeeding the bullet seating.
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  #14  
Old 01-22-2008, 10:39 PM
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Federal 180 Accubond factory loads were measured with Chrony F1:
From a 26" barreled HS rifle, 3090 fps ave for 6 shots
From a Kimber, they averaged 3057 for 9 shots.
Temps when shot were about 60*

My 180gr handloads are 2950fps with 180 Accubonds and 180 Sciroccos.

Doug~RR
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