Our friends at Muzzle-Loaders.com put together this informational video on sizing your Thor bullets. Understanding that every single barrel has a very slight difference in bore diameter is important when it comes to purchasing the best bullet for your muzzleloader. Thor Bullets® is a bore specific bullet meaning that they come in multiple sizes to fit perfectly for any rifle.
The Thor Bullets® Sizing pack will allow you to size your bore before you buy a whole pack of bullets, this will save you time and money and give you confidence that you are purchasing the correct bullets for every single one of your rifles. This is an essential step of purchasing the correct bullets for your muzzleloader, to increase accuracy and velocity.