elkaholic
Well-Known Member
Max approx 5 grains higher.
**this is a new cartridge so this is a best guess based on my 6.5 Sherman
6.5 SHERMAN MAX
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**this is a new cartridge so this is a best guess based on my 6.5 Sherman
elkaholic
Well-Known Member
A client last week used 65 RL33 behind a 147 to fire form and was right about 2900', so the numbers I gave above should be good
Loaded
61.5-66 8133
64.5-69 RL33
Only a # of Retumbo on the shelf, better save that. There is room for more 8133 and RL33 in the case, but they're fairly full.
Will see what happens tomorrow. My 26" bartlein has 105 rounds on it so far. So who knows when it'll start to pressure up. My 6.5 prc bartlein carbon did around 150 or so.
elkaholic
Well-Known Member
If I had to guess, I'd say 69 RL33 wont pressure it to max. Im thinking 70-71, but we'll see?
I have N570 too but man it gets exponentially harder on bores smaller you go. My 338 rum has moved 6 thou in 200 rounds, my 300 norma improved has moved 27k in 530 rounds w/ N570. I can't imagine how hard it is on 7mm and 6.5mm.
elkaholic
Well-Known Member
I think youll find RL33 to be pretty hard on it too!
PNWdude67
Well-Known Member
Rich, you're going to force me to build a Rifle with a Lone Peak Medium Ti Fuzion yet!! What about a .338 MAX? Now that would be slick on a medium Fuzion Ti.
LongRangeFever
Active Member
What is a good fire forming load with n570 and 147s? I ran 59-61grs last night on my 20in. 61gr showed 2669 fps with no pressure. Never used N570. Using 6.5 adg brass and cci250 primers.
elkaholic
Well-Known Member
Sure would. The 250 Berger will run up to 300
Personally. I would use a faster powder for forming, but if you use 570, I would jump it up to about 65 grains. Even though N570 should be a great powder in the max with longer barrels, it may NOT be for a 20"?
LongRangeFever
Active Member
Sounds good. I have a lot of h4831sc. Would that be more suitable, and if so where would you suggest I start? Also have some reloader 19.
Finished testing with RL33 to pressure. Had faint ejector but no lift 71-71.5, had moderate ejector(enough to catch my knife edge) and light lift with 72gr. Heres those last 4 shots at 220y. 70.5-71.5 are 1/3". 72 opened the group to 1"
Going to work through 69.2-70.2 and find how good that node is, and finally test seating depths.
Going to work through 69.2-70.2 and find how good that node is, and finally test seating depths.
Data I've collected w/ 156 bergers and a verity of powders, CCI250, adg brass. 26" bartlein 8tw, Tikka action.
Brass required turning for proper clearance. Process is: cleaned, annealed, sized w/ 287 bushing, expanded with 262 mandrel tumbled. Gives 2.5k nk tension.
I don't run the psi a lot of guys do with the Sherman cases. I get ejector I can catch with the edge my knife, I typically shut it down, whether bolt lift is there or not. Some times lift/prominent ejector show up at same time.
My buddy and I built rifles at the same time, 90% same components. Barrels are both equally slow compared to said/advertised velocities.
Brass required turning for proper clearance. Process is: cleaned, annealed, sized w/ 287 bushing, expanded with 262 mandrel tumbled. Gives 2.5k nk tension.
I don't run the psi a lot of guys do with the Sherman cases. I get ejector I can catch with the edge my knife, I typically shut it down, whether bolt lift is there or not. Some times lift/prominent ejector show up at same time.
My buddy and I built rifles at the same time, 90% same components. Barrels are both equally slow compared to said/advertised velocities.
