I haven't shot any 338 bullets from them, but I have used their 416's, 423's both soft and solids and I can highly recommend them. Their bullets are reasonably priced for what you're getting, which is a bonded bullet of good design. In fact, they are one of the few manufacturers to make bullets of proper design and profile for double rifles, which can be very fussy about the bullets fired though them, as the bullet needs to closely resemble the bullet the gun was regulated with in shape and weight.