Both powders work great in my LR308
I am currently using 4064 ,due to the fact that when I got my DPMS,a friend wanted to shoot it,and after I broke in the barrel,he used some of his reloads with 4064,and 168 gr.HPBT match,and the first 3 shots made a perfect cloverleaf @ 100 yds,with the stock trigger.
As soon as the weather breaks,I am going to work out a load for
4895,as I picked up 8# at Camp Perry last july,and the unavailablity of 4064 ,unless you want to pay $32 per#.
My experiance using small base dies,is;
New brass fired in my M-1,M-14,or LR 308 is,if the brass was originally fired in my rifle ,I only need to FL size.
I picked up 1000 LC NM brass at Perry,and could not even get a lot of them into a sizing die,without shearing brass off around the base.
I think they were fired out of an M-14 with a WAY o/s chamber
I had a slightly rusty 0-6 die ,and I chamfered the opening to allow the base to squish down some before putting them through the SM base die,and I had to use a friends 50 BMG press to do it.
My Co-AX press,I ripped the bolts out of my bench top trying to size them.
Once I got them sized ,and trimmed ,I used the same 30 cases,for all of my range testing,and reloaded them ,at least 10 times each,as I wanted to see how the case web would hold up after needing the base sized that far. After app.10 reloads each,I did not experiance any head seperation,and all were just FL resized,no small base needed,and the only jams,were due to my brass catcher bag,kept closing up,and would leave cases sticking out at 90 deg.
Once I got my loads fine tuned,I managed a 600+yd.shot on a prarie dog. And the still look small in a 40X scope at that range.