There's several powders that work well in the .35 Remington with 200 grain bullets, but the old "standard" load of 36.0 grains of IMR 3031 duplicates or betters factory loads. Most folks find point of impact doesn't change either. Your Herter's bullets may not behave as well as Core-Lokts.
I've used 10.0 grains of Red Dot with 158 grain jacketed bullets. This gives me 1400 fps in the Marlin, but point of impact does change. This is a minimum load since anything less isn't consistant.
I usually load 34.0 grs. of ReL 7 over 200 gr. Rem. RN core-lokt bullets or same charge for a RCBS 210 FN cast of water quenched WW. The Rem. bullets clock out at over 2100 fps and the cast at over 2200 fps, with exceptional accuracy for both. Groups of three run about 1-1 1/2" at 100 yds. ReL 7 meters very consistently from my powder dispenser, speeding up re-loading. This load was picked up from Ken Waters "Pet Loads" book.
For a light load, try 10 grs. unique over your 165 cast. I use this for the Lyman 158 FN cowboy bullet. At 50 yds., point of impact is same as above loads, with groups running about 1.5", as I plink 10-20 rounds. This bullet drops from my mold at about 162 grs. when cast of WW alloy.
I truly enjoy my .35 Remington Marlins. There's alot of punch packed in that round when loaded to full potential in a nice, easy carrying package.
Watch out for those Marlins, they have a way of reproducing, when left alone <!--emo&--><img src="http://beartoothbullets.com/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''><!--endemo--> , especially the older ones. As a matter of fact, a 1957 336 RC .35 Rem. followed me home, last month. Priced just too good to pass up. But that's another story.( I may have to find his .30-30 brother, just for the sake of keeping the family together.)
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