Ordered a .204 and also some 32gr and 39gr Sierra bullets and Winchester Brass. What loads have you guy's found to be most reliable? What Powder, primers etc. Thanks for your help!

Try 24.8grs. of RE10x with the 39 grainers, 27.3grs. Benchmark for the 32s, 205M primers. That should get you started. Jay

try a 39grn sierra w/ 27.5 of AA2520(this is a max load) and rem.7 1/2BR (3750fps)

xmr 2015 works great for me. start is 22.8 and max is 25.6. i found that 25.4 is most accurate for me had a 5 shot group that measured .380 useing rem 7.5 primers

Hard to give an answer without knowing twist rate. The range from 1-14 to 1-8 twist covers the range of available factory twists. All weights won't work for all twists.