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Hybrid 100V pushing 180gr Combined Tech Ballistic Silvertips by Nosler. Absolutely deadly and accurate in my Accumark.

Make sure you don't seat to the lands...wby's love to jump. Found that once I shot my Audette ladders to find load I could really fine tune group size with seating depth. Also found my particular rifle really finicky about this. The ladders showed me the optimal load and seating depth tithened the group to <=moa. At work so don't have my notes but memory says I was about 8?? grains above max before I saw pressure and my load landed about 5??grains above max. Using Noslers book but again I don't have my notes here. I also use the ladders to find max load. I start mid range of recomended load and go up by about 1% increments for first ladders to about 10% over max. WATCH FOR PRESSURE!!! This gives me a basic idea where the sweet load is. Second set I I go -2.5% to +2.5% of optimal load from first set in .3%increments. Then I pick the middle load of the obvious 3 or 4 load group that forms the tightest rung. I shoot my ladders at 200-300 yards using a caldwell lead sled and remote trigger release for ladders and group developement. Sandbags and finger for sighting in. Prone and backpack for final sighting to best simulate field conditions.

I have used this on other rifles (.260AI, 7mm-08, .375HH) but found seating dpth less important and less dramatic in regards to group size and could better tighten groups adjusting load. In fairness though the .260 and 7mm-08 were basically seated to the lands and I use an ogive comparitor rather than OAL. As long as bullets fit in mag OAL is not a concern which I learned the hard way that what workd in a rem model 7 wont fit the box in a blr. I also played with some different bullets in WBY that I could not get to group before i learned this and by manipulating seating depth tightened them up to minute of moose after I found this method

I used 7828 but hunt from August to Feb in temps from +20 to -40 and found it swingy with temp. I also tried reloader 19 and it was ok but hard to find. Same with retumbo so when I switched to 100v I bought a buttload.

Sorry for long post but I luvs me some wby
 
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todbartell said:
velocity is pressure
Click to expand...

That doesn’t stand up to even a casual scrutiny.

Cut a foot off your barrel. Pressure unchanged, velocity lowered.

Load the subject 300 to equal pressure with Bulleye in one cartridge and H1000 in another. Pressure equal, velocty not equal.

Shoot a round with a completely obstructed barrel. Pressure off the chart; velocity zero

Pressure peaks in the first few inches of the barrel but there is a lot of speed made after that by the mostly burnt but still expanding gas. Pressure dropping, velocity rising. Some barrels are better at it than others.

Peak pressure is part of velocity but only part.
 
Dogleg said:
That doesn’t stand up to even a casual scrutiny.

Cut a foot off your barrel. Pressure unchanged, velocity lowered.

Load the subject 300 to equal pressure with Bulleye in one cartridge and H1000 in another. Pressure equal, velocty not equal.

Shoot a round with a completely obstructed barrel. Pressure off the chart; velocity zero

Pressure peaks in the first few inches of the barrel but there is a lot of speed made after that by the mostly burnt but still expanding gas. Pressure dropping, velocity rising. Some barrels are better at it than others.

Peak pressure is part of velocity but only part.
Click to expand...

I believe the point he was trying to make is that, all else being equal, higher pressure equals higher velocity. Yes there are instances where that isn't true, but those are exceptions. - dan
 
Dogleg said:
That doesn’t stand up to even a casual scrutiny.
Click to expand...


In the context of this topic, getting high velocity without "pressure signs", the high velocity is tied to the chamber pressure of that ammunition. If you're getting 3200+ fps from a 300 Wby 180gr, it's not a mild load. Just because you don't have to hammer the bolt open after firing a round, doesn't mean it's not at max, or over max PSI
 
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