6x45

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ghjacobs

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Any input. I am looking for barrel twist data. I was thinking of a 12 twist, but have talked to several people that have told me a 10 twist would be better. I would use no bullets heavier then 8o grains. Most likly 65 grain and below. This is going to be a bolt with a 22" sporter barrel.
 
I have 2 in 1:10 and both shoot 60-85 very well... in fact haven't found a bad bullet/powder combo yet. I personally stay away from 90-100's because I use my 243 for these heaviers anyway.
 
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Any input. I am looking for barrel twist data. I was thinking of a 12 twist, but have talked to several people that have told me a 10 twist would be better. I would use no bullets heavier then 8o grains. Most likly 65 grain and below. This is going to be a bolt with a 22" sporter barrel.



I am looking for the same info to build a calling rifle, thanks for the post.

What kind of velocities are you guys getting with your setups? How are they performing on coyotes?
 
I have a 20" 10 twist Shilen and a 16" 12 twist SUM in 6x45, both AR based.

Been enjoying shooting the 20" of late and been getting an honest 3/4 - 1" average 5 shot groups off a bipod with both 60gr Sierras and 70gr Blitzkings using XMR 2015.

Patiently waiting to get the 16" back from a facelift. Will most likely be shooting those 60gr HPs or 65gr Vmax in the slower twist barrel for hunting...
 
Most of the people I have talked to are getting around 3300fps in a 22" with 60 t0 65 grainers. Around 3200 with 70 grainers. Almost 3000 with 80 grainers. I see no need for a bullet heavier than that in this small a case. That is what 243's are for.
 
A little history on the 6x's. In bench rest shooting there was a class called sporter which required a 6MM bullet or larger. The 222 was necked up to 6mm for this class and then the 222 mag came out which was immediately necked up to be a 6X47 giving more velocity which was badly needed. The twist used was a 1-14 for bullets up to 70 grains. The 6X45 was never used as a BR cartridge that I know of. The current 6mm of choice in BR is the PPC to 300 yards where the 6BR takes it to 1000 yards. The rule of thumb is, use the slowest twist that will stabilize the bullet you want to shoot. The best twist is the one you want/like.


I'm using a 1-14 twist on my 6WOA with 68 grain Barts bullets. The best group so far with that combination is a .112" 5 shot group. I also have a 6WOA with a 1-12 twist that will shoot 1/4" 5 shot groups consistantly. /ubbthreads/images/graemlins/grinning-smiley-003.gif
 
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Dan's advise is very good. Get the twist rate for the bullets that you want to shoot.

I can't say enough good about Sierra 60g HP when it comes to accuracy and killing power on coyotes.

My experience is that the faster the twist, the more finicky the loads become with the slower twists being more accurate over a wider powder charge spread.

You should expect your rifle to be a 1/2" shooter or better in an auto, and 3/8" or better in a bolt gun.

The problem with shooting 80g bullets in this case is that you will have the tendancy to un-zip the animal on a broadside shot at longer ranges (300-350 yards due to trajectory). Also, you may run out of case capacity with the 80's if shot out of an AR...you may want to ask Dan about that if this is a possible application for you.

Good luck!
 
Like Ackleyman said, the 60 grain Sierra bullet is awesome, both for accuracy and performance. I have been shooting the 6 x 45 with the AR and bolt-guns for about 16 years, and have built piles of AR uppers over the years. The 12 twist does a great job as far as fine accuracy on the 60 and 70 grain bullets, and for the folks that plan on shooting the light bullets, I have always suggested the 12 twist.

I have had both the 12 and 10 twist and have never actually been able to say that I got better accuracy with the 12 twist and the light bullets over the 10 twist. Since I hunt white tail with my 6 x 45 and use the 85 grain Nosler partition, I have gone strictly to the 10 twist on my own rifles.
 
I agree on using the slowest twist. But I would like to use the 85 Nosler also. I shoot BR and us a 14 in my 6ppc, but a 15 twist in my 22 short ppc. In my 30x44 I use a 17 twist Lilja with 118 grainers.
 
my 6-duce has a 1-12 twist, and shoots the 70 gr blitzkings and 75 vmaxes both at 1/2" from a 20" sporter tube. using 24.0 gr blc2 and wsr primers, getting a chronyed speed of 2988 with the bks.
shot a yote off the bipod at a measured 187yds last saturday, watched the fir fly of the back. hit her just between the shoulder blades, sitting there looking at me.
haven't played with any other powder but 4198, but better accuracy from blc2. i'm sure more velocity is available, but such a pleasure to shoot and results speak for themselves. lee
 
I'm shooting a 6x45mm also, mines a Rem 600 with a 22" Pac-Nor #1 SS with a 1-10 twist. It has shot great with just about everything I've tried. It dotes on 55gr NBT over H-335 and 55gr BK over Benchmark. Shot some 62gr VG (report on different post) even they got down to .75. The 55's are running 3300 to 3350.

The rig is a really nice calling gun fast handling for the short stuff but heavy enought to to handle coyotes as far as I care to shoot. Have a Leupold VX-II 1x4x20mm mounted on it.

As someone brought up the 6x47m I'vey got a 6x47mm Improved 30 degree (6mm-204Ruger) barrel on order and should be here end of next month I'll write it up after I've had a chance to play with it.

AWS
 
I picked up a 20" 6mm WOA upper, made by White Oaks off Gunbroker a month ago. I was a little worried about the twist as it was a 1x8, and I plan on shooting bullets 70 gr. and under.

Long story short it shoots great. The largest group with 70gr TNT speers and 65gr V-max was .563 using H-4895 powder, hornady brass and CCI mag small rifle primers. Powders charges from 29-30grs all produced close to the same size groups.

Can't wait to try the 70 TNT's on coyotes this fall.

Randy
 
I had my Cooper M21 rebarreled by Cooper to 6X45, and their standard twist is 1-14. I've been pleased, if surprised, by the accuracy I've gotten from the 65gr Vmaxs up to and including 80gr Sierras. So far I've used H4895 and 2015, and am going to give H322 a go as well.....
 
I just returned from the range shooting my 6X45 here's a target or two.
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Mike I did get that AA2015 to work pretty good after all. I think the first try was me being a bad wind doper.The speed is not where the H335 load is but this load is slightly better in the accuracy dept.That could be the bullets though I have only tryed the H335 with 65gr VMax.I guess that will be my next load to try the H335 with the Berger.Mine is the 1/10 twist Shilen by the way.
 
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I just returned from the range shooting my 6X45 here's a target or two.
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Mike I did get that AA2015 to work pretty good after all. I think the first try was me being a bad wind doper.The speed is not where the H335 load is but this load is slightly better in the accuracy dept.That could be the bullets though I have only tryed the H335 with 65gr VMax.I guess that will be my next load to try the H335 with the Berger.Mine is the 1/12 twist Shilen by the way.


do you have any idea what your velocity is with the 2015. was thinking of trying it and 335 next with the blitzkings and the tnts. ive had real good luck with the 50 gr tnts in my duce, cheap to shoot, too. lee
 
Yes the 2015 averaged 2898fps with a 68gr Berger and with the H335 and 65gr VMax it is averaging 3159fps from a 22 inch barrel.
 
more than adequte for my needs, but doesnt sound like any real gain over my blc2 load. sounds like -if it aint broke dont fix it - syndrome. thanks for the info, lee
 
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