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Profits Q's

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Ryeguy

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Wondering about prefits.. Id like to build a new rifle and stuck between another magnum sized for LR hunting or a small LR target/ deer rifle. Have kids growing up and would like a rifle they could shoot also, current rifles are a bit big for them. So im curious about having 1 that I can swap from a 6MM to 6.5/7MM. Anyone have any insight on this? How's the precision after swapping around barrels? Any tips, do's or dont's? Tools needed at home to swap? Perfect world would be a 6BR or similar for practice/kids/deer then swap to a 6.5 or 7mm for LR deer/elk.
Thanks
 
Ryeguy said:
Wondering about prefits.. Id like to build a new rifle and stuck between another magnum sized for LR hunting or a small LR target/ deer rifle. Have kids growing up and would like a rifle they could shoot also, current rifles are a bit big for them. So im curious about having 1 that I can swap from a 6MM to 6.5/7MM. Anyone have any insight on this? How's the precision after swapping around barrels? Any tips, do's or dont's? Tools needed at home to swap? Perfect world would be a 6BR or similar for practice/kids/deer then swap to a 6.5 or 7mm for LR deer/elk.
Thanks
Click to expand...
It depends on your action. If your doing what @akdad has, it is pretty straight forward. If your action is designed for the 6MM BR, it might not be able to accommodate 6.5 CM. If your action is designed for the 6.5 CM, you might have some feeding issues.
 
I have had outstanding results with all of my Proof Research prefits. barrel vice, action wrench, torque wrench, and go no-go guages. It is simple to swap. Shouldered prefits are preffered but I had a Brux on a Savage that would truly shoot .1 something consistently, smallest being .08".

Pictured is a 3 shot group my daughter shot with my Proof 6 Dasher on a Zermat TL3 action. She was happy.
 

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Jamie said:
I have had outstanding results with all of my Proof Research prefits. barrel vice, action wrench, torque wrench, and go no-go guages. It is simple to swap. Shouldered prefits are preffered but I had a Brux on a Savage that would truly shoot .1 something consistently, smallest being .08".

Pictured is a 3 shot group my daughter shot with my Proof 6 Dasher on a Zermat TL3 action. She was happy.
Click to expand...
Now THAT'S a group!
 
Lots of good choices out there today that accept prefits. Maybe too many LOL. Anyway, just make sure action length works for both calibers and you can also have a standard and mag bolt to run say, a 6 Creed and a 6.5 PRC or 7 SAUM on basically the same gun. I will warn you though - chances are good you will still wind up with multiple complete rifles 😃
 
Jamie said:
I have had outstanding results with all of my Proof Research prefits. barrel vice, action wrench, torque wrench, and go no-go guages. It is simple to swap. Shouldered prefits are preffered but I had a Brux on a Savage that would truly shoot .1 something consistently, smallest being .08".

Pictured is a 3 shot group my daughter shot with my Proof 6 Dasher on a Zermat TL3 action. She was happy.
Click to expand...
LOL I would be happy too!!! Even little girls shoot better groups than me 😂
 
I started with a Savage short action that I had a smokeless ML barrel for deer hunting and the original 243Win barrel for general shooting and coyotes. After the second time I did the swap, I decided it was a PIA and built a separate 243AI and left it in the ML configuration. It's doable, but if it's not a shouldered prefit you need to set and verify the headspace each time. Remove and remount the optic. Got half a dozen used Rem700 actions and made a stable of prefit rifles, happy with every one of them.

For the kids, I built a couple on chassis so I could use adjustable AR-style stocks for length-of-pull. My son's first deer gun was an AR pistol in 6.5 Grendel because it was simply the easiest way to build something with the right length of pull and small size/weight he could handle. One could cut down a stock but they grow so fast.
 
Jamie said:
I have had outstanding results with all of my Proof Research prefits. barrel vice, action wrench, torque wrench, and go no-go guages. It is simple to swap. Shouldered prefits are preffered but I had a Brux on a Savage that would truly shoot .1 something consistently, smallest being .08".

Pictured is a 3 shot group my daughter shot with my Proof 6 Dasher on a Zermat TL3 action. She was happy.
Click to expand...
It's uncanny. Some girls/women can just naturally shoot the heck out of a pistol or rifle.
 
I have a Remage prefit. It's a Criterion varmint 6.5-06 barrel on a Mack Bros. action. I put it in a chassis. I use it as a long range rig and it shoots very well. I don't do any barrel switching with it though.

I certainly don't want to highjack the thread but I'm sure the op is wondering this as well. For those of you that do swap, how do you get the barrels to index exactly the same every time so headspace stays the same? I thought about possibly using a set screw through the barrel nut. Or perhaps this is where a shouldered prefit shines?
 
Are you intending to build a full custom, or rebarrel something that you already have? If you are planning to build something brand new and the end to end investment that is involved, there are lots of options. The least expensive and highly effective option would be to rebarrel one of the factory actions that do not build different length actions, they just limit bolt travel, with some form of bolt stop. A savage Axis comes to mind. As for the small cases, I think this is an excellent idea. Get the kids going on a small, very efficient cartridge. My son shot a buck this year with a 6Dasher with 88 grain hammer hunter. Almost no recoil and the deer died in a textbook fashion. The BR based cases will give you some feeding challenges unless get a DBM set up with a customized magazine.

I would think about a 6cm, and 300WSM build on an action with interchangeable bolt heads.
 

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