Originally Posted by rockhouse
I have no idea. Just getting into researching. My plan is to take advice of much more knowledgable and experienced reloaders and experiment with what works best for my rifles. I plan to reload both plinking and match rounds, both for the same rifle until I can build another rifle and have dedicated plinking and match rifles.
You are doing the right thing, finding out as much about your endeavor before wasting money and time, getting it right the first time.
Load them both the exact same when you start. Same brass, powder, primers, bullets, to the same specs. Use the loading data and trim lengths and overall load lengths as listed in your reloading manual.
As you begin working your loads, experiment with different powders and bullets. Always follow the loading data in that book. NO THERE IS NOT a separate listing for 5.56 round in most loading books.
As you progress and begin to learn what to look out for in performance and pressure signs, you will better be able to increase your loading pressures, powder charges, for your weapon into the realm of the normal 5.56 loads. But only if your weapon is marked as being a 5.56 chambering.
Things to remember:
A) Always full length size new or new to you brass (unless being fired only in one bolt action rifle, always full length size.) Trim to length also. This is a good thing to do each loading.
B) Always begin with the suggested starting loading. Only move up after you have determined it to be safe.
C) Sort your brass. Thicker, heaver brass is made by different manufacturers. These differences can and will make pressure differences in your loads.
D) The change of components will make a difference in pressures.
E) Consistency is the rule for safety and accuracy.
F) Unless you have access to a Crono, you will be hard pressed to tell a book spec 223 loading from a 5.56 loading. Unless you have a true need and have learned where the safe limits are, high velocity loads are not worth the time.
G) Load to find that special loading that meets your needs with your weapon. A combination of function, accuracy, energy and cost is your true goal.
Loading is fun, produces better ammunition, tailors that ammunition for your weapon and gives you a better understanding of your weapon and its loading capabilities. Loading will not save you money. It becomes addictive and you will only want to shoot more and more.
All ways error on the side of safety.