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I got the action all trued up, barrel threaded both ends and chambered.
I polished a few rough edges on the bolt/bolt channel and burnished in some molly powder which made it very slick.
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The new barrel was a slightly bigger profile so the stock needed a little more inleting and will get a touch up with some stain and oil.
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Finally reassembled it and threw a scope on to test on some paper tomorrow. The rings are too high but will do for testing purposes.
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I put a few of my 75gr HP loads for my CZ through it over the chrono and they were a bit hot for the faster twist so will drop a grain and load some to mag length for the tests.
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geez that m85 looks mint 👍😎👍
Yep shes pretty tidy now.. Ill work a load for it shortly and throw some lead on paper.
I managed to save 21.5" of the donor 6mm barrel and it shoots 55" faster than my 22" with the same loads! Will back it off to more brass friendly loads and go from there though. 2950fps seems to be a happy spot for the 75gr Sierra HPs and H4895 but will give the H335 a go when @Tommy visits.
@Wingman keep up the good work and thread
one day stars will align and ill join the 6x45 crew 😎👍
i read on a oz forum many moons a ago that 6mm varmint projectiles work like hunting ones less explosive at 6x45 speeds be interesting to see if true or just internet scuttle butt
Cheers mate.
There is some truth to that theory. SOME varmint and target bullets act like hunting bullets at lower velocities but that depends a lot on range and the bullet.
The 6x47 for example at 3000fps is not actually that slow. I would stay away from the lighter jacketed bullets such as 70gr blitzking, 70gr and 80gr Sierra varminters for anything heavier than goats and stay away from that shoulder bone. The 75gr and 85gr Sierra varminter had have heavier jackets designed for the bigger case .243s at 3800 to 4000fps so these are the ones you want in the 6x45 for deer.
Typo in that last post.. 6x45 @ 3000fps not 6x47 but both are true
Something else to consider is the lower BC of many of the flat base type varmint bullets. They wash of speed much faster than the longer more slippery hunting bullets. I would consider this 6x45 a 250 to 300yard max hunting rifle.
Good words there @Wingman, it's a 300yrd round and no more. I've treated it exactly the same and haven't got myself into trouble sticking to the self imposed rule when used on goats.
How are you getting on with dies? I did post earlier that you can make a FL sizer from 223 bushing type dies easy enough. Redding do not list a 6x45 in their S Type, so I made one myself and it works a treat with the .263 bushing for my brass.
I ordered a set of Reddings from my buddy in the states but had been using Southerman's set while he is back in Canada.
I had thought to make some from a .223 rem set of bushing dies and just run the reamer through the seating die but by the time you have done all that and bought a 6mm seating stem, neck bushes and expander balls etc it gets pricey. Robert at workshop innovation can order a set for I think it was $145 in his monthly Redding order.
I just got back from testing the Zastava on paper.
I ended up backing the load off to 25gr from 26.5gr with the 75gr Sierras and seated them to 47.5mm to feed from the internal mag.
This dropped the velocity back to 2800 and the pressure signs have gone. I actually found my CZ 527 loads at 59mm are in the lands on the zastava so there must be a bit more meat on this ones rifling than the CZs barrel.
Between the faster twist and the deeper seating the loads took 1.5gr less powder to match similar pressures.
Hopefully H335 can claw back a bit of speed in this rifle.
Probably the worst time of day to do it but I tested it at 100 meters in the screaming hot sun with the worst mirage and being mawled by bugs but still surprised myself with a 3/4" group!
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Valid point about expense. I went the bushing way, as I had a neck run out issue with my Hornady 6mm/223 factory dies. I think this is attributed to the shape of the elliptical expander ball not having a lot of parallel area to keep square in neck when sizing. Its a great expander for opening up the necks though. Changing to bushing die, with no internal neck sizing on return stroke fixed the issue.
@Mathias got a pic of your 6x45? 😎👍
ok Wingman...you are forgiven...that looks very tidy and she sure knows how to punch holes in things....
I cant see me wearing out my .223 barrel anytime soon....but if I ever do ,well you have given me food for thought.
Thanks Mr Duck, Im glad I finally have your approval :thumbsup:
Some advice on your .223 barrel..
Start dipping your bullets in super glue and then sand. ;)
From when I first built it, nearly 8 years ago. First victim.
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nice rig 🤙😎
@Mathias that looks great!
I figured Id spend a bit of time on this ones stock and tidy it up in general. The metal work is pretty much perfect after a couple of blue touch ups.
The stock is a typical patchy beech wood and needed some refinishing in the barrel channel after opening it up for the heavier barrel. It was pretty good over all with only the odd mark and a compression mark on either side of the butt from someone winding it up in a vice at some stage.
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I hit them with the steam wand on my coffee machine which lifted them out well.
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I also added a couple of s/s pillars in the action screw holes as it was showing a bit of wood compression and they are bad for splitting if the action screws are not evenly loaded. The front was already bedded but I added a bit in the rear pillar and under the bottom metal to get a nice even torque without adding load.
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It then got a good scrub in thinners and a coat of walnut brown with a touch of a darker stain in the lighter patchy spots. I used a very dark Black bean stain on the checkering to give it that classic Sako look the several coats of true oil. Came out pretty sweet and a nice satin finish.
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On to the next one...
Thats really nice work @Wingman, I like the fact that you have passion in your work.
since 6x45 fps seems up there is there any benefit going to 6tcu expect abit more fps ?
sweet as enjoying this thread 😎👍
got the calculator out running numbers🙉🤯🤐 then i may join #6×45/6tcugang
hmmm you have me thinking re poking pillars in now.....got heaps of arrow shaft to do it...my 20year old hot glue gun bedding isnt quite as neat as that job....but not far off it and its still working just fine LOL.
Well that came up pretty nice Phil. :thumbsup:
not sure if Ive mentioned it before,letting the spring tension off bolt when its in storage is a good thing....I had a few misfires early on untill mate put me onto doing it,may just have been hard primers but never had issues again....has added bonus that a bofin cant fit bolt into rifle.
my .223 took the baa out of two house muttons tonight,them hornady bulk pack 55grn loads sure do make thier eyes pop out nicely.
Finally fitted up the last 6mm barrel on the Sako Vixon this afternoon. I had pre machined and chambered the barrel to streamline the process but murphy thew a few curveballs as usual.
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After removing the old .223 barrel and fitting the 23" blued chromolly barrel the Stug stock barrel channel needed a little more inletting to clear the slightly heavier barrel.
Then it was off to the chrono with a few test loads.
Unfortunately there was an issue with a week firing pin spring that needed sorting before we could proceed.
After a bit of fluffing around I made up a temporary spring spacer to preload the firing pin a bit more as a temporary measure until the spring is replaced.
My load for my CZ 527 of 26.5gr of H4895 and a 75gr Sierra HP shot 3020fps in it and showed a little pressure, probably due to the faster 1-10" twist so I backed it off to 3000fps with 26gr of H4895 which looked pretty good.
Loaded up 6 rounds in newly formed PMC brass with a BR-4 primer and took it to the range.
I was handicapped by a 7 power loopy and didnt have any 30mm Sako rings on hand to swap it out with something bigger so just made do. There was a light wind but not enough to use and an excuse.
1 shot to sight it with a quick adjustment followed by 5 more gave an acceptable half MOA group.
With some larger optics and a bit of time spent in brass prep and loading this one will be a tack driver.
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hmmm maybe what I posted above couldve helped prevent the issue in first place LOL.
tidy grouping as always.
Thread revival time, hope @Wingman doesn't mind me using it.
Just did a test fire of a few rounds with my latest 6x45mm creation. Made up from a Sako A1, used Bartlein 6mm 1:8 2B barrel at 20", DPT and Swaro 3-9x40 4A. Desert Guns NZ did the work for me, really happy with Marks skill again.
Wasn't sure how the 1:8 would go with the lighter 75gr loads, nothing to worry about there! The 85gr HPBT Sierra shot equally as well, though I cocked up a good group at the end. I'm not a good paper shooter.
75gr HP Sierra's & H335 were most happy at 2980fps average, 85gr HPBT's & CFE223 at 2796fps average. ES on both were nothing flash and I should be able to lower them with better case prep and seating.
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75gr 3 shot group 7.5mm
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85gr 3 shot group 11.5mm with average shooting from me
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Mind? Absolutely not.. the more that share their 6x45s on this thread the better. It will make for a good reference thread for others for years to come.
Nice looking build? What made you go with such such a fast twist with a very limited COAL in the Sako?
Cheers.
Barrel became available at the right price from a mate, so that confirmed it. My other Sako 6x45 is on a 1:10 but 23" long and it shoots both these weights in similar fashion, though a bit faster. I was intent on having a shorter more compact gun with this one and there room to go shorter without issue. I'm used to the COAL of these Sako's, to me, its the only negative and all else outweighs this.
mean lookin rig Mathias👍😎 this thread is 🤤🤯😳
Ive been saving this box load of 650x Black Hills match brass to neck up and load for mine on a rainy self isolating day..
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I shorted my 6x45 barrel down today from 22" to 20" and re threaded/crowned it..
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@Wingman what did the 2" do to speeds?