Thinking of building in a new caliber.

[Leg]

I'm still thinking 6.5x55 for myself.... but will have to go long action to do it which causes mag issues. Dam....

Just thinking out loud here, as I'm way out of my element (how do I get back to Black rifles?). What about building a 6.5 Swede with a PH 1200C as the base? Granted this only gives you four rounds but if you can locate C3 mags or have the capacity to make them it would be do able. I have a PH1200C in .300 Win Mag that does have a 5 rd C3 mag, don't ask me what, if anything, is needed to do the swap, rifle was like that when I bought it.

I was just looking at my mag and it looks incredibly simply to make, mag body is two halves tack welded together. Just create a forming die for the feed lips and you're good to go. Maybe if I ever get access to some equipment I'll try my hand at making a 10 rd version.

 

[Mystic Precision]

LS, the 6XC, 6-6.5X47L can be made from 22/250 or with some effort 243 brass. Quite a number have been successful using 22/250 brass just to keep cost and availability in line. There are numerous wildcats that predate (back in the 80's) these two that have done well - all based on 22/250 or 243 brass.

My experience with Win brass shows me this stuff will take a severe beating and come back for more. Plenty accurate too. Maybe the new Norma and Lapua can take more but when you are already in toasty territory, pushing harder just makes problems that much more dramatic.

Also, the elevated pressures that the N&L brass can run at is not useable in most production actions. Vault tight BR actions becomes a must to handle and contain the pressures while still operating 'without pressure signs'.

At the very least, a bushed firing pin hole and well lapped lugs are manditory.

Bullets continue to be problematic even in the US. New 117gr poly tipped is now shooting in prototype form. Looks promising but only one US supplier. In a larger case, this will soon be the LR 6mm to beat.

When Hornady comes out with a high BC 6mm bullet, I will get excited about this cal. Right now the 6.5 still offers better BC in a easier package to obtain in Canada.

HD, anything the Swede can do, the 260 reg or AI can match. So much easier to package in US dimensioned actions. Have a look at the new Savage mags, they will handle a OAL almost 3" long and still be in a 'short' action.

Jerry

 

[Kodiak99317]

I have been shooting a 6-250 for a year or so, draw back is that there is a ton of work to make brass. If you do not want to make the brass (and if I could do it again...) I would go with the 6x47 Lapua. My 6-250 is approx. 48.6 mm long (1.914") and is basically a 6BR run in deep. The 6x47 Lapua would do the same without the brass making issues. Second choice would be a plain old .243, it too can get the job done. For SR (300-600 yds) it is really hard to beat the 6BR and it's variants. Yes, a 6BR can go 3000 fps with a 105g bullet, but the pressures are higher than with the large cased 6x47, 6-250, 6CM, 6Swiss Match and 6XC and the 6BR brass will not last as long, IMO.

 

[jkajfes]

I have been shooting a 6-250 for a year or so, draw back is that there is a ton of work to make brass. If you do not want to make the brass (and if I could do it again...) I would go with the 6x47 Lapua. My 6-250 is approx. 48.6 mm long (1.914") and is basically a 6BR run in deep. The 6x47 Lapua would do the same without the brass making issues. Second choice would be a plain old .243, it too can get the job done. For SR (300-600 yds) it is really hard to beat the 6BR and it's variants. Yes, a 6BR can go 3000 fps with a 105g bullet, but the pressures are higher than with the large cased 6x47, 6-250, 6CM, 6Swiss Match and 6XC and the 6BR brass will not last as long, IMO.

I'm not sure this is the case Keith if you spec it right with the right 6/250 reamer... technically all you'd need to do is open the case necks up to 6mm by running a mandrel down the cases... and have at it... I played with a tight necked 6/250 only because I love neck turning brass... rather I thought I did... I think you could easily get away with just opening the neck and have at it.

106s, 107s and maybe the new fangled 115's a few right circles to the right and one or two circles to the left before you go to the firing line to keep the wind gods happy and you could do fine at 1000!