I never had problems with Blazer Brass ammo. S&B, Blazer Brass, Speer Lawman - my favorite and accurate ammo. I prefer 124gr, but Blazer Brass 115gr is also OK. About dirtiness - it depends on batch, but I won't say that Blazer Brass is dirtier than S&B. The most dirty ammo I ever shoot was Remington 115gr sold in bulk.