Listen to what JB is telling you. I agree with about 95% of it and the only exceptions are these:
1.) When switching from brand X to brand Y, you will often see a great first group. TRUE, but this may not always occur if brand Y is a really poor ammo for this gun and almost never happens if I am only switching lots between two lots of Lapua for example. Since All the lots of Center X have the same lube, powder, primer and brass, they all shoot in a similar manner and swapping lots does not require cleaning and has only small impacts related to muzzle velocity and bbl harmonics for the most part. But if you swap from 10x to Lapua or visa versa, you will often see one screamer group and then one or two bad just as Jessi said.
2.) When swapping ammo brands some of my rifles settle much faster. Those same rifles also shoot nearly all good quality ammo well. The finicky rifles are consistently finicky and take longer to settle down.
3.) Every rifle has that one brand and specific lot that it shoots best with. The variance between the best lot and the others is less with those same best shooting rifles. I have an Anschutz 54, a Winchester 52 and a Savage Mkii that all will shoot almost any ammo well within reason. I am now comparing RWS, Lapua, Eley, SK to one another, not Remington Golden Bullet. Now the peak accuracy potential of the Savage is not as tight as the other two but The other two are high pedigree rifles in great condition with world class optics on them as well. And the addition of the great optics can make much more of a difference than a great lot of ammo compared to a average or even below average lot. It took me a long time to learn that. It is not a variable when testing ammo lots but if you are already testing ammo lots, you have a strong desire to improve your overall precision shooting capability and that is all about minimization of all the variables.
4.) Not a comment by JB but Eley ammo does not feed well in all repeaters. My Savage will not reliably feed it and even has issues with Lapua hanging up on the last round with one after market mag. I believe this is due to slop in the mag well. I have some new mags to test to see if it is really the ammo's fault or the design of the rifle and if it can be fixed.
5.) Any President who can lead Congress to simplify the American tax code will go down in history as one of the greatest leaders of my time. Sorry, was completing my taxes and cannot understand why it has to be so F-ing complicated?? !@#$%^&* Add up all your sources of income. The total is now $XXX,XXX. Now look at the tax rate table and choose one of the three available rates that applies to your total income. If you make $0-45k you pay 9% (everybody pays something unless they are zero income), if it is $45-250k you pay 23% and for all those over $250k, you pay 30%. No deductions, no exceptions, no tax credits. The entire Federal return could and should fit on one sheet of paper. We could all argue on the rates and the number of tiers. You could make it 5 or even 6 if you want as long as all citizens with earned income pay at least some amount. NOTE to admin, sorry for the hijacking rant
Irish