Originally Posted by backwoods83
All rifle are obviously different but with retumbo you may go up to 74grns before you see pressure, if you got this on hand you may wanna try 64-66grns Imr4350 with a CCI BR2 or Fed 210 or CCI 200 or maybe 68grns Imr4831. I get 3064fps with an ES of 6 with 162 a-max and 66.3grns Imr4350 and CCI BR2s. The retumbo will give you the speed but I doubt you'll be able get the ES below 25.
Thank you, this is the kind of info I am looking for. I have never used Retumbo until now so I am going to play with it for a while and see what happens. Before I had this gun rebuilt and customized I used H4350, H4831, and IMR 7828 powders with 160gr accubonds and CCI 250 primers with good results. The IMR 7828 ended up being my favorite load with an ES of 10 or less on avg. and a velocity of 3056fps. I have never used anything other than magnum primers. So what advantage does the lighter primer have over the magnum?