Mixing ammo...bad idea IMHO. Not to flame you brother, just my 2 cents. After all, its sometimes tough enough becoming intimately familiar with one type of load, much less 3. When one is experiencing an adrenaline rush of maximum proportions, things tend to get mixed up. Therefore, Im a strong proponent of finding a specific load, practicing with it (almost exclusively) and then making sure that its the ONLY load found within the gun (for HD).
Hello Insight-Neo -------------- First off , I can tell you are not out to "flame me " and for that I say "Thank You " !!!
I have shot IPSC/IDPA/Action 3 Gun/SASS/Steel Challenge type matches for 20+ years and have shot upwards of 50,000 rds. of Buck,Slugs,and Birdshot in matches and maybe another 50,000/70,000 in practice.
In another post I stated why I chose to load my SG as I do ---- First round to go BOOM is a Hi-Brass #4 Birdshot ----- I do not live in the Taj Mahal and ANYWHERE in my house , we are really talking FEET and not YARDS. Even with the shortest brl. I own , at 15 FEET the shot string is around 10/15 INCHES wide. With years of practice behind me , I can get off a AIMED 2nd shot in less then 1/2 of a second. With a semi-auto , my split times are around 1/4 second. ------- a face or center of mass hit at 15 FEET -- WILL give me enough time for a 2nd shot. My 2nd thru 5th shots are OO Buck and the last two or three are Slugs --- Slugs are in case the BoogieMan ducks behind my freezer etc. or worst case , the fight ends up outdoors.
One of the BEST THINGS about a SG is that it does take a variety of ammo --- Slugs , different size Buckshot or Birdshot , Sandbag/Rubber Buck-Slugs/Tear Gas/Non-Leathal , and many other kinds. NOTE --- not all these types of shells will work with a semi-auto but almost all will work with a pump/double brl. etc.
Neo --- thanks again for your CIVIL reply.
EDIT --- OOPS , REASON for the FIRST round birdshot is a loved one may be on the other side of the person you want to shoot --- ie. sleeping in another room etc.