With Gunsite more off than on these days, this forum may get a bit more traffic.

Here are two trajectory tables to compare.Now show a comparison between a 150gr at the usual speed and a 180gr at the usual speed.

The "datum" shoulder diameter is .400". A.40 calibre or 10mm case might work better.All these tools are comparators. Comparing one case...

Here is another mehod to give a "close enough" measurement.Size 5 cases to minimum, trim to minimum spec, load a moderate charge and shoot t...

Any idea when the 6-pack Pro will be back in stock?

Set your die up according to the following procedure.Not only will your headspace problems disappear, your cases will last longer as well and you will...

Ds JPlease describe how you set your sizing die before sizing your cases for this specific rifle and batch of cases.

Most reliable method is to take the rifle to a gunsmith to measure the headspace.Second place is to shoot the rifle as is and set the sizing die to bu...

No

"The primers were indented at times, and sometimes pushed flat, and blew out three or four times.""The webs of the blown cases were far...

Is the primer pockets loose in the cases with blown primers?Did you measure the velocity of the shots where the primers were blown?Who loaded the ammu...

Are the primer pockets loose on thoses cases?

New brass usually has a much smaller base-to-shoulder dimension than fire-formed. If your theory is that excessive headspace causes blown primers, the...

Well, blown primers are usually not a headspace problem unless it is mm's to large. If your firing pin can set off the primer, it shouldn't ...

The astronauts did that exact experiment on the moon with an eagle feather.Oh dear, another one who believes the moon landings were real. We shouldn&#...