Let's talk max loads, when do you "know"

[z7]

Caution, do not "jump in" to the loads discussed below, start low and work up.

Ok, i started low and worked up.
varget
178ELDM
win brass
CCI BR2 and FED 210M

most frequent load:
44g. varget, 178ELD M .005 off the lands (just barely not touching basically)
2660fpsavg, ES 11fps, with 25 shots on the record

"hot" load 45g of varget **Hodgdon Max** for a 175/180g bullet
2720fps, es 10fps with 10 shots on the record

I am using a mausifingfied action so there is no ejector plunger. primers look the same between the two loads, not flat or cratered,
bolt lift is the same, just like it always is.

I see hodgdon's load data says around 2700fps is max for a 175 SMK, Hornady data says that 2500fps is a max load for a 178g bullet (regrettably i have not really used hornady data since my first reloads, they are very conservative typically)

I don't want to keep pushing varget any higher, it is at or above max load for several book sources but I am considering an experiment with pp200mr where i have seen folks getting 28000fps out of 185 berger juggernauts. supposedly, that speed can be achieved without exceeding book maximum velocities

my question, in the absence of the classic pressure signs, if you are looking for a higher level of performance, when do you stop? I am happy with my 44g of varget load right now, no need to bump it up higher for my shooting needs, but a new powder combo.........

 

[Dwb1957]

I usally stop when I see pressure signs or close to book max powder charge or book vel if I have similar barrel length as reloading manual book. I have gone over book max charge if I am seeing groups decreasing and no pressure signs for a load that I'm not going to shoot a lot of. For target /group shooting I usally don't chase vel just small groups but hunting loads a want top vel with descent groups.

 

[Dudedog]

Might have some pressure signs at

28000fps

Hate it when my fingers do that (and they do it frequently)
28000 with a 185 would be a juggernaut!

 

[FROGO207]

I usually stop when I get my most accurate load that is stable over the expected temp range I will be using it at before reaching the max published velocity I can find with that combo of bullet weight and propellant. I am not one to go nose bleed high just to say it can be done. Wears out the barrel/firearm and wastes materials (brass,propellant) for no need IMHO. I went through my speed phase with racing airplanes and motorcycles years ago.

 

[Walkalong]

If you want to load over book max and fly by the seat of your pants it's none of my business, but we don't do it here.