tech24
HP rifle shooter
First I say that all powders will perform well IF they are loaded properly.
Titegroup is an extremely fast burning powder with a high pressure curve and a very small margin of error. Dont get me wrong, its a great powder and I use it all the time. But because of its characteristics its not always the best choice for someone new to reloading. As long as the loader understands that it has a very small margin of error, there should be no issues. Powders like Titegroup are very sensitive to bullet weight and slight differences in OAL. Being able to spot signs of overpressure is not something beginners have the experience to do. This is another reason why Titegroup isnt the best choice for beginners. It is also very easy to not notice a double charge of Titegroup since the charges are so small in appearance.
IMO, the 2 best powders for beginners loading pistol calibers are W231 and Unique. They can be loaded in many different calibers (.38, 9mm, .40S&W, .45acp) and dont have the higher pressure curve of Titegroup or even Bullseye. They are also very volumess powders so its easier to spot a low or high charge.
Ah I got it, just wasn't sure the reasoning but that makes sense