Model 7 300BO Rebarrel Options?

[Davidheart]

I've got a Model 7 in 300BO I'd like to rebarrel into a predator/varmint rifle. I'd run about a 20" barrel.

While neat, the 300BO is really a useless cartridge to me and I could chamber to whatever I want on the lathe.

I have a 1:8 twist 22 barrel on hand and plenty of 223 brass and 22 caliber bullets which leads me to lean toward a 223ai but I'm not sure how well the 223ai will feed out of my staggered feed M7? I'd hate to rebarrel to 223ai only to have it feed like trash. I could go straight 223 but what fun is that?

I'm open to suggestions. Killing groundhogs, fox, and coyote from 50-300 yards.

 

[SBS]

.20 Practical (.20-.223) with 39-40 grainers. Still, nothing wrong with the .223 - pretty versatile with an 8 twist.

 

[SVT_Tactical]

Could always try the 223ai and if it don't feed, set barrel back enough to standard 223 being you have the tools.

 

[marazzi59]

300 bo uses same case as 223 and 223ai. Feeding I think should be fine. Maybe look for a bottom metal that would use ar mags and maybe slightly alter barrel feed ramp. Maybe

 

[marazzi59]

What are you going to do with the 300bo barrel after you remove it?

 

[Davidheart]

What are you going to do with the 300bo barrel after you remove it?

Likely sell it.

 

[marazzi59]

What's the twist and how much?

 

[Davidheart]

What's the twist and how much?

The factory twist is 1:7. It's 16.5" with a 5/8-24 thread and thread protector. 100 plus shipping feel free to shoot me a pm!

 

[marazzi59]

No rush but pm when you get the barrel off. Thanks

 

[Hotshot]

20 vartarg!

 

[Davidheart]

No rush but pm when you get the barrel off. Thanks

I'll shoot you a pm when it's done.

Someone else suggested the 20VT to me too but would it have the horsepower for a coyote at 250/300? Seems like a dandy little cartridge.

 

[Hotshot]

20VT will drop a 250 yard coyote like you rolled a sack of potatoes off the tailgate of your truck.

 

[TheCZKid]

20VT is a fun cartridge, very accurate and would be fine at 50-300 yds, with a 32 grain bullet about 3600-3700 fps. The 20 Practical could give you more distance with speed, shooting a 40 grain about 3700. Very similar to the 204 Ruger in ballistics, but brass is cheap as your LC 5.56. Easy to convert 223 to 20P, that's why it's called practical.

 

[muleystalker]

My choice is a 6x204 throated for 95gr SMK's , it just so happens that throating is perfect for 87gr VMAX also and shoots the 75gr VMAX well also. You can do a 6x45AI also. Both will feed just fine.