I have a Savage 110 varmint in 22/250 that I want to change to "20 Predator". So, I need to get a barrel and was directed to "urbanrifleman". The 20 Practical is based on a 223 cartridge necked to 20 cal. I guess I would need a new magazine and think it would be a direct swap? As for the bolt head/face I was told I could buy a "kit" to convert to the smaller diameter. Searching around a bit, I can't figure out where I would buy such a kit. Would Savage sell the parts? I know a lot of guys like the Savage for being able to replace barrels themselves, so parts must be available. I'd appreciate any tips on how to go about this project. Thanks in advance.