Re: Remington 600 ~ 35 Rem Making Me Crazy!
Posted: 14 May 2020 12:07
So I spent some time today doing some Quickload and ballistics calculations on various options. There are not many for this calibre but I figured, what the heck. First I had to decide why I wanted a different load. My 760 hasn't shown itself to be my most accurate firearm even when fired on a rest. It drops moose like a cannon though but with the 205 grain cast it drops off fast at ranges over 150 yards. As I am hoping to get a chance next year for a Caribou hunt, which often means more open country shooting, I decided I wanted a load that was effective out to 200 yards with at least 1300 FP of energy at that range. Trajectory had to be within a 4 inch span out to 200 yards. C.O.L. had to be no more than 2.5" and case fill no less than 95% and no more than 105%. Peak pressure was not to exceed 45,000 PSI. This is over 5000 PSI above the published max EDIT: ( Maximum pressure is based upon the CIP measurement system as given in Quickload not the SAAMI system. The CIP has a PMax of 39,885 PSI. SAAMI has a PMax of 33,500). Tthe 760 has a strong action with the most popular calibre for the rifle being 30-06. Right now this is all paper exercise and if I decide to start making actual rounds I will be working up as per normal. Once last criterion was I had to have the powder in my inventory. Not buying another powder.
So with these "targets" I got to work. After a lot of trying different combinations I hit upon two promising loads using the Speer 180 grain FP #2435. This is a short stubby bullet (.890) suited to the 1 in 16 twist of the rifle. Two powders came in within my set parameters. They are Win758 and H335. H335 was the optimum giving best predicted velocity (2435 FPS) and case fill @ 98.5% in a 1.910" case. Energy retention at 200 yds was 1355 FP. The trajectory for both was very close with the rifle sighted at 200 yds the highest mid-range was just over 3". At 250 yds the drop was just over 5". Peak pressures were in the 42,000 to 43,000 range with H335 being higher.
I have all the components except the bullets which I was pleasantly surprised to find out are stocked by a Canadian supplier. The price is decent at a C$45 per 100 count (about $32 US). Looks like I may soon have another project on the stove and it is all RD's fault
So with these "targets" I got to work. After a lot of trying different combinations I hit upon two promising loads using the Speer 180 grain FP #2435. This is a short stubby bullet (.890) suited to the 1 in 16 twist of the rifle. Two powders came in within my set parameters. They are Win758 and H335. H335 was the optimum giving best predicted velocity (2435 FPS) and case fill @ 98.5% in a 1.910" case. Energy retention at 200 yds was 1355 FP. The trajectory for both was very close with the rifle sighted at 200 yds the highest mid-range was just over 3". At 250 yds the drop was just over 5". Peak pressures were in the 42,000 to 43,000 range with H335 being higher.
I have all the components except the bullets which I was pleasantly surprised to find out are stocked by a Canadian supplier. The price is decent at a C$45 per 100 count (about $32 US). Looks like I may soon have another project on the stove and it is all RD's fault