Powder charge

T

tatervaw123

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Got a 300WSM 28'' rockcreek barrel in 11.25 twist. Going to start out with the 190 gr SMK. I have some H4350 and was wondering about the starting charge of powder to work with? Also have some 168 VLD and 168 SMK's maybe can tinker with them too. Thanks for the help.
 
According to Sierra.......................

300WSM.............190 with H4350EXT.......start 56.2grs & a max of 65.0grs.

168 with H4350EXT.......start 58.7grs & a max of 67.0grs.

This was with Winchester brass & WLRM primer in a 10 twist barrel.
 
Not what you asked about, & so maybe I should keep my opinions to myself, but even Sierra would allow their 200 SMK is a better design than the old 190. I, of course, would mention the 187 BIB. (Skip the next if you read this forum often: The BIB 187 holds the IBS, NBRSA, and Australian 10-shot group records. Different shooters, different rifles). The Berger 185 LRBT is also a new design with some advantages, and has done well.

You have the twist rate to support these bullets, and their long-range performance will most likely be better than any of the bullets you've mentioned, most likely for group, and surely for score.
 
Thanks to both of you. The 190 SMK's 168's are what I currently have and I am certainly not limited to these. Like most of you I am in it for what shoots accurate in my rifle. So if it means going to get what it takes so be it. Not gonna stick with something that dont shoot or more importantly dont agg. So all comments welcome. Just trying to find a place to start. Where could I find some .30 cal 187 BIB bullets?
 
Charles E said:
Not what you asked about, & so maybe I should keep my opinions to myself, but even Sierra would allow their 200 SMK is a better design than the old 190. I, of course, would mention the 187 BIB. (Skip the next if you read this forum often: The BIB 187 holds the IBS, NBRSA, and Australian 10-shot group records. Different shooters, different rifles). The Berger 185 LRBT is also a new design with some advantages, and has done well.

You have the twist rate to support these bullets, and their long-range performance will most likely be better than any of the bullets you've mentioned, most likely for group, and surely for score.
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BIB's website states "not recomended for twist rates faster than 11.25" for the 187's. All but one of my 30 cals is 1-10. I would like to give them a shot, but don't want to waist the time/money if the twist is wrong. Also, how often are the 187's available. Can I get them whenever I want, or do I need to hord them like primers??
 
Tod,
There is no need in trying the 187 BIB in your 10” Twist .300 WBY! You would need something like a 13” or 14”. My 11” Twist .300 Ackley BLOWS them up at 3,200 fps… The WBY can hit that mark easy. I could not safely load the Ackley below 3,200.
Baron
 
ok lets hijack this thread some more......bib 187's in an 11 twist....in a 300 win mag.....am i gonna have a velocity issue ? my 208s do 2950......
any one have one bullet to send me or list some numbers like length ,bt lenght, body length.....
my plan was to shoot the 208's to ensure i built the rifle right then go to better quality like...berger or bib....

thanks
miike
 
R. G.'s being advisably cautious. I started shooting them in (essentially) a .300 Dakota, about 3,175, with a 10-twist. No problems. Like Baron, Joel Pendergraft started blowing them up in his .300 MHV (a Dakota on Steroids), it was over 3,200.

But yes, if you're going to push them over 3,150 or so, wait for another barrel than a 10-twist. I personally think an 11-twist will work fine at 3,200, but that's a guess.

BTW, at Hawks Ridge (1,000 feet up, 50-80 degrees F), 210 Berger VLDs shot fine in a 12-twist. Not a recommendation, but we do tend to overstabilize our 30s.

That old Dakota 10-twist would also shoot 240 Sierras . . .
 
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Good point, Ghost.

The first barrel I had for the BIBs was a 10-twist, throated out for the 240 Sierra's. It fit the BIBs just fine.

The second, I started by seating them deep. It could be the pressure ring went into the shoulder, can't remember. I soon throated it out for them, as they shot well

But the point stands: The 187 FB needs a longer throat if you don't want the PR through the neck. You'll have to compromise a bit at first if you want to reserve using a bullet with a short bearing surface as well. And at some point, you'll likely have to decide to throat out the barrel if you go with the BIBs -- or whatever bullet you go with.

These days, from long, long experience, I get my reamers with a short throat, and have a throater reamer for each caliber. Don't even have to pull the barrel or action, we throat it in the rifle. You can make the simple tooling, or, I believe, buy it from PT&G, and maybe Manson.
 
Ok..to continue the hyjac.....how about 1-11 300 WSM and the 187 bib? Am I getting close?

The original tube in my HG was a 1-11 Kreiger that eveidently was shooting the bibs, but had been re throated for the 210 vld.

Not sure why the gun came up for sale. I'm sure , like most, he got tired of lugging around that monster. My answer to that was to buy it, add 47 more pounds to it, and lug it around??!! :D
 
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Tod Soeby said:
Ok..to continue the hyjac.....how about 1-11 300 WSM and the 187 bib? Am I getting close?
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That will work. Jim Hardy had that setup, I believe. At the NC State one year, I won a relay day 2 but ran out of bullets, so Jim lent me that rifle for the shootoff. A bit later, Phillip Yott came out of the scoring shed with one of those smiles he has, handed me a certificate for Precision Shooting, and said "You shot a screamer, but didn't win." That setup would flat shoot.

Jim could also use the 210 JLK VLDs, and the old JLKs were the same design as the original Berger 210s. You could ask him the details of the rifle.
 
Just made a call...no bullets available for at least three months. :(

Oh well. Maybe next year.

Unless someone wants to let a hundred go.
 
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