With the Howa kit there is no problem, you should be able to just drop it in. The drawback is that it's all plastic and although it functions correctly, I hated the plastic. PPG makes a machined aluminum one that uses a different replacement/mag that will allow for longer COAL's. However, you must machine the tab off the back of the receiver to make the mag fit properly. It's not a hard job if you have an end mill but not a job you want to do with a Dremel. I put one on a .308 Vanguard in a Body's At-One stock and it was great. If you decide to go that route, only do it if your Vanguard is a standard caliber. There is no benefit to doing it with a Weatherby caliber.