I want speed...

[Fire Dog]

Yea a 240 WM in a 1-7.5 twist. I will have to have one. Thanks to this thread, I haven’t thought about it in some years. Kind of gave up on the idea. All I can say about Weatherby mags is most people either hated or loved them. Me I was neutral. But I can tell you the few I played with, that Roy Weatherby knew what he was doing.
240 WM 95 VLD on left. It’s so cool.
6XC 105 VLD on right. Works as advertised .

View attachment 1623724

That 6XC looks like the neck sizing bushing has scored the neck… Or is that just something in the photo?
Wash & Rinse each time if not doing a tumble or sonic clean will help prevent abrasive crud getting into your dies.

 

[Frankr]

It’s just an old round. Been laying around for a few, ok a bunch of years.
I see what you are asking about. No it’s just tarnished. No gouging in it.

 

[Alex Wheeler]

6PRC will go over 3500 but tuned around 3460 -3480 with our 103 in a 25" krieger with n570.

 

[Kevin1990]

If you're looking for speed, may I suggest the 22 eargesplitten loudenboomer? haha.

 

[nockhunter]

6mm Rem AI.

This

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Mike

 

[SKWERLZ]

@Frankr I honestly feel the same way about the 6 BR/BRA.

I remember showing up at antelope camp with a dainty little 9 pound BRA and 105 Hybrids. They looked at me like I was insane. We spotted a sure enough booner at 701 yards, and about the time they suggested a plan for getting closer, I sent one and felled him like a pine.

Fast is fine. Accuracy is final…. Or whatever he said.

I was quite impressed with my lil 6BRA even out to 1500 yards.
Would be a fantastic critter gun.

 

[Fire Dog]

If you're looking for speed, may I suggest the 22 eargesplitten loudenboomer? haha.

Kev, now you are showing your age if you know about the Eargesplitten Loundenboomer cartridges...

 

[std7mag]

Kev, now you are showing your age if you know about the Eargesplitten Loundenboomer cartridges...

Egads I'm getting old!!!

 

[std7mag]

@ISS,

Like the popular racing saying.
Speed costs money. How fast do you want to go?

I saw a 22-06 for sale on here a few years ago. Owner said barrel life was in the 500-600 round range.

If you're looking for flat out fastest, Lazzeroni has your number.

 

[ISS]

Funny thing, I am sitting here at the computer desk looking a 22 EGS case. I wonder, how much speed I could get out of the Berger 90gr VLD?

 

[Big Mc]

Speed Kills! I lean towards max velocity with good (1/4moa) accuracy. That is why I am giving serious thought to another 6-284. I did one 22-284; but the barrel was toast in about 500 rounds.

YMMV,

ISS

I have a 17/223 with 20 gr Noslers i get 4137 , only good for 1/2 in at 100 yards. The Yotes around here hate it. Tommy Mc

 

[ebb]

I have a friend that had a guy build a 7mm-338 lap. The smith recommended the twist (i forget what he said) and when my friend started working up a load he could not get any bullets to say together. He finally found he could not explode a Branes. The smith told him shoot it all you want with the Branes bullets till after hunting season when work gets a little slower and I will put on a slower twist barrel at no charge. Lesson is if you can't keep ^mm 87 grain bullets together use Branes till it needs a new barrel and fret not it won't be long. Takes an honest smith to eat a barrel and chambering job.

 

[wildcatter]

I'm curious about what bullet you will use and what twist for this rifle. I expect this is for distant rockchucks, probably. Back when I was in line for barrel work by Greg Tannel I used one of my 1-8 30" 1.350" Lilja barrels for a heavy 6-284. So far I have used my heavy 6.5-300WSM for long shots but the time is coming for me to try out the 6-284, just need to scope the rifle. Sometimes I think that barrel would have been better used on a heavy competition IBS rifle(6Dasher).My thought on this is that the 1-8 twist is really more than needed for the bigger 6-284 case, a 1-12 with the 87 vmax would probably been what I should have done. I will make the best of what I have and use some of my 105 Amax bullets for varmints.Just curious on your thoughts about using lighter than 105 class bullets for the use on varmints, do you think the 1-8 twist will spin the 87s too fast? Been thinking about trying the new ELD-VT 6mm 80 grain , but Ive heard some people are disappointed with them. I will try some for myself but I definitely appreciate your input.
Matt

Save the 105's and 108's for paper. Your going in the right direction thinking 1-12, and 87's. If you want speed, (your cake) and accuracy (to eat it to) the faster twist is not the way to go. RPM's! Even hot rodders know enough to go with the small block when they want max RPM's!!

I think you're over doing it with a 6-284. I used one for 1000 BR and LR PDs back in early 2000's with an 8T. Barrel lasted less than 1000 rounds.

I cut off the entire chamber and tried a 6XC with 87 VMax's for LR PDs....much better. 87s still tore PDs apart @ 800-900 yards.

If I did it again today I'd use a 6BR.....or a 6GT if I wanted a little more speed. I'd still opt for the 8T to be able to shoot 105s.

I made this mistake a few years back, and was quickly, and expensively educated! I built a 6mm AI, same thing in the end with a better neck! But 1-8 for those long range accurate 108's. Yep they were easy to hit 3400 fps out of the 26" Krieger, but anything faster than about 3100 fps and accuracy just started going away, as speed increased! TO MANY RPM's, the integrity of the bullet started going away. It stayed together, but now, my .2" groups were more like .5". whats the point?

The other thing is, the tougher the bullet, the faster it has to go to do the same damage as a lighter bullet with lighter construction, and the lighter bullet doesn't have to over reved to stabelize it. Now a 3800 fps 80 to 85 grain bullet is still much faster at 800 yards, and doing the damage the 108's could do at 500.

The next thing is, the 80 to 85 grain is easy to tune to .2" to .25" moa for under 2" groups at 800 yards if you could dope everything perfectly!

But even if you dope everything perfect with the 108's running 3400 or so, the .5" moa is now 4" for the very best you could expect if you dope everything perfect!

Now in the field, that means your fooling yourself with no wind flags, and no concrete bench, or 1800 dollar rest, and trying to think that 3800 fps 1/4" 85 grain bullet does not have the advantage! Plus since we know at that range were talking less than perfect hits, the 85 grain bullets gets to give the advantage of some damage when it does connect. the 108 is now no more than a drill bit, poking a whole with no help doing any more damage!

 

[wildcatter]

Something like this what you're looking for? 6 PRC running 109 hybrids. Not 1/4 MOA, but got to 1/2 regularly without much testing - important in a hot rod.

This is exactly my point! It will shoot better than 1/2", but you gotta slow it down to do it! My post up top explains this. I should have never built that ackley in the first place on that 1-8 barrel. I did and as you said, I ended up cutting the chamber off and making it a 6x47 Lapua to poke paper with. It still ran the 108's to .2moa groups ate 3100 fps. and it did it with about 15 grains less powder! and I didn't have to slow it down to get it's best accuracy.

Today I just finished what I was wanting to do with the 6mm AI, come up with as good of a LR varmint gun as my old 257 Roberts AI was. Only this time I did what I should have and built a 257 AI! I used a 1-10 twist barrel, but think I could have done the same thing with a 1-12 twist. I won't shoot anything over 90 grains anyways.

Day one with H4350 powder showed me I was right with the 88 grain Bibs HPBT. .420 Coef. @ 3750 fps. very first 3 shot group was .36" moa. I'm sure I did not pick the perfect neck tension, seating depth, powder charge the first time out! I am sure I can tune this to under .25" and at this speed, possibly a little more? But run this on my geo ballistics and wow, much better for varmints than a 110 or 120 grain load, and I wouldn't even think they would do this good for accuracy with a 1-10 twist barrel? But for sure, at their 400 or so less velocity, and heavier construction, forget any help from the bullet if it does make contact.

I just forgot, varmint hunting is not target shooting, and target shooting will never be varmint hunting! What is best for one, will never be the best for the other! If you want your speed or cake, and want to eat it to, or have the accuracy along with it. don't over rev it! High rpms will never take it in a big block, you'd think I would have learned that after my first 454, but today I have been educated again.

 

[FNSafari]

Speed Kills. Especially barrels.

True enough, but a barrel is a consumable, just like the bullet, powder and primer. The cost of doing business I guess.

 

[ArtinNC]

I got speed but had a little trouble with it LOL LOL

 

[wildcatter]

I got speed but had a little trouble with it LOL LOL

LOL! that I hope was a lucky day for someone, from the looks, it could have been very devastating?

 

[ArtinNC]

LOL! that I hope was a lucky day for someone, from the looks, it could have been very devastating?

It is just a picture I found . Just though I'd post it for fun .

 

[Frankr]

lol. Yea looks like a 700. There is a reason why they make bigger stronger actions.
I don’t like even Ultra mags in a 700. If you know someone who has a 700 UM stand 15 yards behind them and watch the barrel with a 10X binocular when they shoot it from a bench. After you see that you won’t want to shoot one again.

 

[ISS]

Aside: NHRA 500cid Prostock motors turn over 10,000rpm.

Aside II: there are unlimited wind flags and mirage readers out shooting Rockchucks here in Idaho. We call the wind flags grass and sage brush. A breeze over 5mph or so is watching the Rockchuck or coyote's hair blow. Mirage readers are watching those organic wind flags shimmer and wave; much like the shimmer on asphalt on a hot summer day. Back up is any standing water.

ISS