Ammo for weatherby 300 win mag

[Carr5vols]

I have a weatherby 300 win mag I can not get to shot as good as I would like I have tried many different brands, grains, etc... anyone else had this problem and what did you end up going with.

 

[Tumbleweed]

Is there a chance your barrel is copper fouled? Have you checked bedding and all other mechanical components?
If so, I would suggest picking your favorite factory ammo and slipping on a limb saver barrel de-resonator. Follow the instructions on tuning. They work. You may get satisfactory grouping with one of those


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[deerkiller]

"Weatherby" 300 Win Mag is no different from any 300 Win Mag EXCEPT sometimes Weatherby rifles have a generous "free bore" which causes a "jump" from the case mouth to contact with the rifling upon firing - you may find that handloading is the best (or only) answer to your quest, BUT first … what does "not get it to shoot as good as I'd like" actually mean ? for a hunting rifle 1" "groups" at 100 yds will work pretty darn good - How is YOUR shooting ? Are you experienced ? Do you shoot a lot ? Is your rifle straight out of the box or one you've had a while ? ALL sorts of variables here …...

 

[Tumbleweed]

"Weatherby" 300 Win Mag is no different from any 300 Win Mag EXCEPT sometimes Weatherby rifles have a generous "free bore" which causes a "jump" from the case mouth to contact with the rifling upon firing - you may find that handloading is the best (or only) answer to your quest, BUT first … what does "not get it to shoot as good as I'd like" actually mean ? for a hunting rifle 1" "groups" at 100 yds will work pretty darn good - How is YOUR shooting ? Are you experienced ? Do you shoot a lot ? Is your rifle straight out of the box or one you've had a while ? ALL sorts of variables here …...

I think Weatherby uses SAAMI chamber reamers. The chamber should be no different than any other brand of 300 Win Mag.


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[deerkiller]

I think Weatherby uses SAAMI chamber reamers. The chamber should be no different than any other brand of 300 Win Mag.


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Weatherby is famous for leaving excessive "free bore" in their chambers of SOME of their rifles, has nothing to do with SAMMI specs - The practice originated when Weatherby came on the rifle scene, in part it's how they reached higher velocities than most of their commercial competition

 

[Tumbleweed]

Weatherby is famous for leaving excessive "free bore" in their chambers of SOME of their rifles, has nothing to do with SAMMI specs

But it does. If we're taking a Weatherby cartridge chambering in a Weatherby rifle, then yes. Each major rifle manufacturer is going to use a SAAMI spec reamer for a specific chambering. That's the whole reason for the SAAMI standard we have. I'm pretty sure Weatherby rifles wouldn't long throat a non Weatherby chambering. I could be wrong, but highly unlikely they would do this.


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[Touchdown88]

Try free floating the barrel first. I did that with my Weatherby and the group shrunk by half.

 

[deerkiller]

But it does. If we're taking a Weatherby cartridge chambering in a Weatherby rifle, then yes. Each major rifle manufacturer is going to use a SAAMI spec reamer for a specific chambering. That's the whole reason for the SAAMI standard we have. I'm pretty sure Weatherby rifles wouldn't long throat a non Weatherby chambering. I could be wrong, but highly unlikely they would do this.


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I would tend to agree with at assumption but would want an answer from Weatherby to be sure

 

[deerkiller]

I would also say that even it it were "free bored" that probably isn't what's going on with the OP's problem - It's sometimes daunting to try and help a question like this as we both understand there are SOO many things if "could be"

 

[ofl0926]

But it does. If we're taking a Weatherby cartridge chambering in a Weatherby rifle, then yes. Each major rifle manufacturer is going to use a SAAMI spec reamer for a specific chambering. That's the whole reason for the SAAMI standard we have. I'm pretty sure Weatherby rifles wouldn't long throat a non Weatherby chambering. I could be wrong, but highly unlikely they would do this.


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He is right. Weatherby is known to have generous free-bore in there Weatherby chambering.

with that said, I would definitely do a thorough cleaning for copper fouling. I use a product from Boretech. I use there specific copper remover in my rifles. you need a good cleaning rod, Tipton nickel jags, rifle cradle and patches. I run three soaked patches down the barrel. let it sit for 15min. then run a dry patch followed by a wet patch again. this stuff from boretech comes out blue when copper is present. hence the reason for nickel jags. do this till your wet patch comes out clean.

 

[Carr5vols]

"Weatherby" 300 Win Mag is no different from any 300 Win Mag EXCEPT sometimes Weatherby rifles have a generous "free bore" which causes a "jump" from the case mouth to contact with the rifling upon firing - you may find that handloading is the best (or only) answer to your quest, BUT first … what does "not get it to shoot as good as I'd like" actually mean ? for a hunting rifle 1" "groups" at 100 yds will work pretty darn good - How is YOUR shooting ? Are you experienced ? Do you shoot a lot ? Is your rifle straight out of the box or one you've had a while ? ALL sorts of variables here …...

Getting like 1.5 inch groups at 100, vexperienced shooter 30 plus years with a rifle in my hand. Have had the gun about 3 years tried many different cartridges and every 5th or 6th shot I will get a zinger that is 3 to 4 inches off the typical group. I will try the items mentioned and hopefully that will improve it. I dont want to injure and animal due to this issue, thanks for the input.

 

[Carr5vols]

Is there a chance your barrel is copper fouled? Have you checked bedding and all other mechanical components?
If so, I would suggest picking your favorite factory ammo and slipping on a limb saver barrel de-resonator. Follow the instructions on tuning. They work. You may get satisfactory grouping with one of those


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How much tighter will a resonator close the group.

 

[Tumbleweed]

How much tighter will a resonator close the group.

You'll just have to try it. It works by tuning your barrel harmonics. I've seen them reduce group size 25 to 50% if they're used correctly. It's not just a slip on and hope for the best. You move it 1/2" at a time shooting 3 shot groups until you find your smallest group. They work


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[Carr5vols]

Thanks man.

 

[Reburn]

Getting like 1.5 inch groups at 100, vexperienced shooter 30 plus years with a rifle in my hand. Have had the gun about 3 years tried many different cartridges and every 5th or 6th shot I will get a zinger that is 3 to 4 inches off the typical group. I will try the items mentioned and hopefully that will improve it. I dont want to injure and animal due to this issue, thanks for the input.

is it a Mark V or a Vanguard S1 or S2? Wood or synthetic? I see you have some options. You didnt say if you were shooting 3 shot groups or how big your group shot is. Most weatherbys have pencil thin barrels that heat up quick. IMO all my weatherby mags are only good for 3-5 shots before they start to open up. I give them 10-15 minutes to cool between groups.

1). Send it down the road. I don't like selling non shooting guns either but this option is much much cheaper then running down the rabbit hole.
2). Take the gun 100% apart look for slop/damage. Retorque stock to factory specs using the factory procedure. I had one that was a tack driver. Took the stock off to install a new trigger. Went to shit. Messed with the torque specs and its back to driving tacks. Also switch scopes and retorque rings and bases. Remember more isnt better.
3). Barrel De resonator as previously suggested. But I hate these on my guns personally. If i can't find a factory load my guns will shoot well I do #2 then if no luck #1.
4). Send it to a good gunsmith and have him fully float or fully bed the barrel.
5). Reload and spend the time in load development to get the gun shooting good.

Personally I dont reload at all and dont want to so #5 is a no go for me. Depending on the gun and price of the gun #4 is usually a no go for me. I personally dont like #3 because its telling me that i should be reloading but I wont. So I would do #2, possibly #4 then take a haircut and do #1.

 

[Carr5vols]

Thought I would let all know finally found an ammo the gun loves. Hornady SST Superperformance in 180 grain.