The Satterlee "classic" doesn't use powder charge groups per se; it's one shot per powder charge weight, 10 shots. Of course you can shoot more than one shot per charge, but then you may as well run a good 'ole ladder, or one of it's many variants.
The 10 shot Satterlee is decidedly dependent on an accurate chronograph. One of things I dislike about the test is even accurate chronys like we have available today (Labradar, Magnetospeed etc) will occasionally miss a shot, that sucks when you only get one shot per charge . And, I swear my Labradar can sniff out a Satterlee test and figure out how to ruin it
I agree. I worded it wrong and was too tired to care lol.
I could be wrong but I thought the Satterlee test was entirely velocity-based, if that's the case I don't see how it could work without knowing velocity.
It is velocity based but when the sweet spot node is found the vertical spread will diminish and those similar fps groups will cluster or be closer to themselves than the others (low/high node) Velocity can also be confirmed w drop or “come ups” with a reliable ballistic app, provided your scope’s tracking is correct. See: Truing feature.
I could not get H4350 to play nice in my Shehane, but it’s happy with 4831SC. For the Berger 180s there is usually a nice node around 2830 fps. Robin are you going to be ok with that velocity or are you going for the next node up?
I’ve had work done by Accurate Ordnance and their product is reliable and built right. I’m lead to believe that you would benefit from doing a thorough OCW test to find a forgiving node. With a 24” 1:8 in a 6.5CM you’ll more than likely find it between 2720-2765fps or 2810-2840 fps ONLY if you don’t see pressure signs. I’m of the belief that if the rifle is sound (built right) it’s really a matter of tuning the load to achieve consistent accuracy.
I own and have used both- (on the same rig btw) I have to give a slight edge in recoil reduction to the Jet Blast. The other advantage is the JB helps to take majority of concussive wave off the shooter. This is a feature Josh really strived for even tho it has rearward angled ports like the popular fish gill designs, i.e. the Hellfire. Only concern w both is you’ll want an adjustable to cinch the jamb nut on the JB. When it’s lightly torqued it won’t come loose. The 419 uses the hand tighten nut but a slight torque w a strap wrench is also advised.
Not to drag up an old thread, but since the last post I've been busy shooting a 6 CM Bighorn Origin and hadn't played much with the 6.5 CM Rem 700. A few months ago, I had LRI shorten the barrel to 24 inches, flute the barrel and perform the bolt timing work. I also glass bead blasted all the parts before assembly. I just got it rebuilt and swapped out the PVA muzzle brake for a Thunder Beast CB in preparation for my thunderbeast ultra 7 that is in jail. Without the mag it weighs 13 lb 7 oz. I'm hoping to get back out to shoot it this coming weekend hopefully have similar results to past. We'll see what happens. Now on to the pics.