For my HD M590A1, should I buy the following or are there better options? Side saddle Speedfeed stock w/ pistol grip Surefire 623FA forend Now for ammunition. I noticed that Northwest Loading had two types of Hornady TAP (non-FPD) 00 buckshot. The red case, marked as "light magnum" is loaded to a higher pressure supposedly to ensure proper cycling in semi-auto shotguns while the blue case is reduced recoil. So two questions: 1. Are there better shells to use? 2. If I TAP is the way to go, do I use the higher pressure shells or the lower pressure?