Summary of the above described test.
I wasn't able to do all that I wanted. Groups with both cases were uncharacteristly LARGE for the rifle. Some targets had only 1 or two hits out of 3 shots.
I tore the rifle apart. There were no loose screws, scope or other wise. The AM amazed me again in that when I put it back together it held the previous point of aim.
One thing I did notice was that my drop tube wasn't matching up with the case mouth properly.:mad: I kept hearing a bit of a noise when moving the funnel to the next case. Turns out I was loosing 0.5gr +/- each load. That pretty much disqualified any but general chrono statistics.
94.5 gr US 869 is a decent load for the REM cases. Just under 3100.
92.5 br US 869 is a bit too warm for the Nosler cases. Velocity 50-60 fps greater than the REM case load.
In every instance the Nosler cases exhibited some bolt lift pressure.
Nosler primer pocket seating pressure reduced by ~50% with each shot. I'd guess that after 4 shots or so, the thumb would be all that's necessary to seat primers.
Rem cases primer pockets open a bit but it wasn't anything near what the Noslers did.
I've loaded to 97 grains of 869 w/o any pressure problems and was shooting 1/4 MOA out to 500 Meters. Today groups were measured by a hammer handle.:(
Here's the deal breaker on the Nosler cases.
All cases were kept submersed in an ice bath right up until the time of shooting while contained in a zip lock bag. It wasn't long until the bag didn't seal and water got in on the cartridges. I figured hey, no biggie.
Recall that I've mentioned that the sizer button does not touch the inside of the neck during resizing? The Rem cases present quite a bit of friction during this stage of the process.
Well I had a cartridge that didn't fire when the trigger was pulled.:confused:
I pulled the bullet and the powder was wet. I don't know if it entered through the primer pocket or the case mouth. There was plenty of wet powder in the case.
I would consider that as a show stopper as far as hunting with them in my rifle.
Summary of the summary:
Nosler cases achieve higher pressure w/maybe 3gr less US 869 than Rem cases with a lot more deformation and resizing pressure required.
The necks are really thin.
Neck tension is way low. If the bullet touches the end of the chamber at all, and is not fired the only thing preventing the 195 RBBT from being removed when the bolt is opened is the bump on the back of of the bullet.
They may leak - at least with my dies and chamber.
I have 30 fire formed and 20 ready to fire form with 3 ruined. What's brass going for on the recycle market