39 gr. SBKs, just a statement.
39 gr. SBKs, just a statement.
On Friday I went to our local dealer to pick up some bullets and was advised that they are out again.
It is going to take another week to 10 days to get in more, I do not know about the rest of you but it sure seems that 39 gr. Sbks have grown in popularity???
It is going to take another week to 10 days to get in more, I do not know about the rest of you but it sure seems that 39 gr. Sbks have grown in popularity???
Keep the Son in your eyes.
Bless You
Dan
Bless You
Dan
- glenn asher
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The word has been out for a while now, since they were introduced, anyway. 40 VMs have been "iffy" in accuracy from the git-go, they were the "next closest thing" and have proven themselves to be very accurate, and less fussy to get shooting well in most rifles. With the high BC rating Sierra gives them, it was a given that they'd be popular. Last year, I did a poll that had them #1 over all the other bullets combined, which says a lot about them. It's no secret that they are fine bullets, and their popularity is bumped up by the poor showing from the 40 V Max and the NBT 40, which is also a bit "iffy" in most rifles. If one bullet is showing itself to be accurate in the majority of rifles, it follows that demand will also lean that direction. It's one heckuva coup for Sierra, since Hornady is the main developer of the Twenty Caliber amongst the big makers.
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Have you seen the pics I have posted lately? Nothing wrong with the 40 VMax's in the splat factor.
Of note, my rifle keyholes the 39 grain Sierra's....too long of bearing surface for my Savage 12FV.
Of another note, the 32 grain Sierra's vaporize about 6 feet from the muzzle when pushed to the 4050 range.............
Of note, my rifle keyholes the 39 grain Sierra's....too long of bearing surface for my Savage 12FV.
Of another note, the 32 grain Sierra's vaporize about 6 feet from the muzzle when pushed to the 4050 range.............
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Interesting the personalities of different rifles. Like acloco, I too have a Savage 12FV. But in mine, the 40Vmax is not very good for accuracy (ok for splat), yet, like acloco, a 32 Sierra will not work over 3800.
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39 Sierra BK in Savage 12FV
My Savage 12 FV loves the 39 grain Sierra BK. I've shot .25" groups with them.
Vaporizing bullets? I'd love to see that.
Vaporizing bullets? I'd love to see that.
janneuf
"Vaporizing bullets? I'd love to see that."
Fairly common when fragile bullets are pushed hard, from a fast-twist barrel. See it now and again at long-range prone matches, where the guys have their rifles set up with fast-twist barrels to stabilize long bullets.
Just a little puff of smoke a few feet or a few yards in front of the rifle - and no hole in the target downrange...
By the way - this can also happen when a fellow loads .25 cal pistol bullets in a .257 Weatherby mag case. Makes the most interesting "birdshot" type patterns on targets only 10 yards in front of the rifle...
Fairly common when fragile bullets are pushed hard, from a fast-twist barrel. See it now and again at long-range prone matches, where the guys have their rifles set up with fast-twist barrels to stabilize long bullets.
Just a little puff of smoke a few feet or a few yards in front of the rifle - and no hole in the target downrange...
By the way - this can also happen when a fellow loads .25 cal pistol bullets in a .257 Weatherby mag case. Makes the most interesting "birdshot" type patterns on targets only 10 yards in front of the rifle...
Those .257 Wby targets were long ago in my mis-spent youth. About the same time we had to use a 4' cheater bar to open the bolt on the same Weatherby with heavier loads.
I survived, and so did the rifle, but sorry, no photos of any of it back then...
Seriously though - a fragile bullet - like many "varmint" bullets - driven hard from a fast twist barrel will often fail only a few feet from the muzzle. Interesting "puff" then it's all over...
Regards, Guy
I survived, and so did the rifle, but sorry, no photos of any of it back then...
Seriously though - a fragile bullet - like many "varmint" bullets - driven hard from a fast twist barrel will often fail only a few feet from the muzzle. Interesting "puff" then it's all over...
Regards, Guy
It happend to a buddy of mine he was shooting 50 grain blitz in a 223 and when the weather warmed up there would be a puff 10 feet in front of the barrel, drove him nutz till we figured them out. We had used older data which was hotter than the new stuff so as the temps warmed up we pushed past the design limit.
If bullets "vaporize" it's because they are overstressed. Too many rpm due to fast twist/high velocity but more likely due to rough bore just ahead of the leade. I shoot eight different 204R's and all of them shoot the 39gr BK very well, some will shoot the 40 V-max and some will not. All shoot the 32Vmax, 32 BK and 39BK as well. I have a 20 BR that will push the 39 BK to over 4200fps with great accuracy. The only downside is at this velocity (under 300 yrds.) it severs a prairedog in to various pieces rather imparting the flips or long air time... The Sierra BlitzKing do have very thin jackets, which is makes them great, explosive bullets for small varmints and less ricoshets. Berger bullets have a heavier jacket for that may still shoot if you get heat cracking in your barrel throat.acloco wrote:Have you seen the pics I have posted lately? Nothing wrong with the 40 VMax's in the splat factor.
Of note, my rifle keyholes the 39 grain Sierra's....too long of bearing surface for my Savage 12FV.
Of another note, the 32 grain Sierra's vaporize about 6 feet from the muzzle when pushed to the 4050 range.............
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My 20BR has a Bartlein cut rifle barrel in 1-12" twist, finished at 28". Can't say enough good about this barrel, I've order more (long wait) and I've got a second identical barrel that I will put on an old Shilen PPC action/rifle this week. I started modifying the BR brass in the lathe tonight to fit the PPC bolt as I don't want to modify the Shilen bolt.
I shoot the sleeved Remington 20BR at 4060-4070fps, the 4200 plus loads were hot in my gun but did shoot very accurately. I'm now using a slower powder and I'm hoping for extra barrel life with the slower load.
My only Savage 20 cal is a LRPV in 204R. It shoots real well but the barrel is one of the worst to clean of all my modern rifles. The powder fouling can really be felt on a patch after soaking with Wipeout. A button rifled barrel can be rough and this one is. I don't have too many rounds down the barrel so I'm hoping it will improve...............doubt that it will ever be what I want though.
I shoot the sleeved Remington 20BR at 4060-4070fps, the 4200 plus loads were hot in my gun but did shoot very accurately. I'm now using a slower powder and I'm hoping for extra barrel life with the slower load.
My only Savage 20 cal is a LRPV in 204R. It shoots real well but the barrel is one of the worst to clean of all my modern rifles. The powder fouling can really be felt on a patch after soaking with Wipeout. A button rifled barrel can be rough and this one is. I don't have too many rounds down the barrel so I'm hoping it will improve...............doubt that it will ever be what I want though.