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Anyone ever chrono 300 WSM?

 
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  #1  
Old 01-21-2008, 08:46 PM
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Anyone ever chrono 300 WSM?

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.
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Old 01-21-2008, 11:07 PM
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GG, I don't know if you want to here from me, however, I thought you might want this info. I have a friend that shoots a 300 WSM and he is using Federal factory ammo with the 180grn Fusion tip.

His rifle is a Weatherby Accumark with a 24" barrel. The highest velocity we ever got on the chrony was 2910fps. Federal advertises a max velocity of 2950 with the 180grn Fusion bullet, so we were getting 40fps slower. The temp was around 50 degrees.

The chronographs used was the PACT Professional XP.

Anyhow, I hope this helps.

Wildcat
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Old 01-21-2008, 11:48 PM
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Quote:
Originally Posted by wildcat View Post
GG, I don't know if you want to here from me, however, I thought you might want this info.
Wildcat
What makes you say this? Of course I would like to hear your input.

And thank you for it. That is exactly what I was looking for.
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Old 01-22-2008, 09:19 AM
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GG, Winchester Supreme 180 went 2980 over the 35P in 70 degree weather out of a savage with a 26 inch barrel. I had a hard time equaling that with hand loads a sane pressures. I have an order in for 8 lbs of H hybred V and hope this powder works well with this cal and hopefully the 6.5-284. I was using H 4350 and accubonds in the 300 WSM and the accuracy load was st 2900.
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Old 01-22-2008, 11:03 AM
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Thanks Budman.
Can I ask you if you were loading the ammo to fit inside a magazine and how much H4350 were you using?
I tried putting 64 grains of IMR4350 behind a 180 grain Accubond and then seated it to fit the magazine and it was such a compressed load that the seater stem actually "bit" into the bullet. It was way over 110% load density.

I have since been tinkering with IMR4007ssc and it has been giving great deviations and good accuracy but I'm only managing 2800 fps with the 180 grain bullet and it is about 100% load density. I would like to get them going a bit faster. Right now, it's a glorified 30-06!
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Old 01-22-2008, 11:17 AM
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Quote:
Originally Posted by goodgrouper View Post
Thanks Budman.
Can I ask you if you were loading the ammo to fit inside a magazine and how much H4350 were you using?
I tried putting 64 grains of IMR4350 behind a 180 grain Accubond and then seated it to fit the magazine and it was such a compressed load that the seater stem actually "bit" into the bullet. It was way over 110% load density.

I have since been tinkering with IMR4007ssc and it has been giving great deviations and good accuracy but I'm only managing 2800 fps with the 180 grain bullet and it is about 100% load density. I would like to get them going a bit faster. Right now, it's a glorified 30-06!
my long range shooting partner loaded up some very accurate loads for his savage 300wsm using 58.9grns of 4007 ssc and 180grn nosler BT. now i don't have the greatest chronograph but it gave us very consistent readings right around 2925. these we shot at 10,000 ft with a temp of about 50'
we also found a big difference using different primers. in the end he is now using standard large rifle primers not magnum primers. I'm not sure on the oal but i remember making it as loooooooong as we could get to fit in the magazine.
hope this helps ;)
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  #7  
Old 01-22-2008, 11:50 AM
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200gr AB data

No data on 180gr, but 200gr Accubond from 26" Savage runs at 2850fps over my CED M2 chrono. H4350, Norma brass, CCI primer Cart overall length 2.975"

AJ
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