Free: Contests & Raffles.
By rounding, you actually made a few groups appear to be equals when in the data, they are not. Calculating MOA of fired shots at given ranges is your best indicator of consistant accuracy. Now... developed a pivot table for POI vs POA for cold barrel shots vs warm barrel shots with noted temperature of barrel at mid span. That ought to keep you busy for a while...-Steve
My favorite part of this whole thing is the gun named Lorraine
You're WAY over thinking this thing man. Pick one bullet... one powder... and one OAL. Find the charge that shoots the best, then play with the OAL a little to see if groups improve. If your results don't yield an acceptable accuracy outcome, switch powder and start again, or switch bullets and start again. Make sure you're shooting the same brass with all the loads that you're comparing... stick to the Rem. or the Win... but don't mix them. Internal capacities vary quite a bit between manufacturers... so the same load could vary drastically between the two types of brass.