7mm PRC starting load Please

[kaseyfied]

Factory ammo at 300.... custom 7prc..2nd pic is handloads @100.. 3 shots chrono said 2961...2960.8...2960.5.. h1000.. 180 eldms

 

[nwmnbowhunter]

Looks like that barrel is a trash can lol...feed it anything and it shoots.. have you tried this seating test at extended range? 3-500? Or even 200?

Next week

It did not like 162 ELDM, 4 different powders. Not very consistent and best i could do was 0.5-0.75... which as you can see can be improved upon.

 

[nwmnbowhunter]

No, its not! Look at a burn chart! My bad, wrong context I think.

Bullet speed is slower for 4831sc.... burn rate is faster.... you are correct in your context... lol

 

[Wilderness Blacktail]

A point of reference thats worked for me is to take the same load for a 7 rem mag and knock 2 grains out of it and work up. So if there is no data on the prc with your powder and bullet, but there is data for the rem mag with the powder an bullet. Pick a middle charge, knock out 2 grains and start there. It worked for me when there was virtually no data on the 7 prc out there.

To add to this, some of the loads on Hodgdon are within a grain of data and actual loads I worked up for my 7rem mag when i had it. The capacity is the same and the preasure limit is higher so theres not much reason not to go this route.

 

[Wilderness Blacktail]

I was pretty dead set on a 22 inch barrel.

It's may be my opinion only, but I felt like the 20 inches too short for the PRC and seven mag. My 26 inch with a 7 inch suppressor on the end of it hangs every stick, limb, tree stand arm, everything else that can make noise it hits walking through the woods. I was excited for the 20 inch but at the same time and all my reading from other forms gives me the impression the 22 inch is the minimum sweet spot length and 24 inch ( while optimal ) is still a little bit long when you add a suppressor on the end of it.

Any other thoughts on that?

Id run the 20" you want. at most you'll lose what 50 yards off of your extreme outter range? So for the price of a much handier rifle you might have to sneak from lets say 900yds n get to 850yds. Seems plenty haha.
Even if your range is shorter than that the relationship of velocity to range still applies and with these bullets at good speeds you will have plenty of range when you need it and will enjoy the handier rifle every time you pack it.

 

[RAMhunter123]

This may have already been said, but I have been using H4831SC with 180gn ELD-Ms in my 22" 7PRC. Coupling this with ADG Brass has led to some great results (including small groups and low SDs/ESs) in my setup.

 

[WAR308]

Id run the 20" you want. at most you'll lose what 50 yards off of your extreme outter range? So for the price of a much handier rifle you might have to sneak from lets say 900yds n get to 850yds. Seems plenty haha.
Even if your range is shorter than that the relationship of velocity to range still applies and with these bullets at good speeds you will have plenty of range when you need it and will enjoy the handier rifle every time you pack it.

You are perfectly correct and (yes) we all know better than to chase the fps numbers, but most of us have a tendency to do it anyway.

The Hill Country YouTube video shows the 20, 22, and 24" lengths and the practical difference is so small, adding to that, 99.9% of my shots are going to be within 400 yards max (most between 80 and 250 or so yards) so it really shouldn't matter. However, for no logical reason I would like to get to at least 2900 with 175's or with the 168's.

 

[WAR308]

You are perfectly correct and (yes) we all know better than to chase the fps numbers, but most of us have a tendency to do it anyway.

The Hill Country YouTube video shows the 20, 22, and 24" lengths and the practical difference is so small, adding to that, 99.9% of my shots are going to be within 400 yards max (most between 80 and 250 or so yards) so it really shouldn't matter. However, for no logical reason I would like to get to at least 2900 with 175's or with the 168's. I can't fix my own stupid.

 

[Lenny Foffa]

So WAR308, I save my H4831SC for my 270 Win and 270 Weatherby Mag loads. I had a couple of lbs. of IMR 4831 sitting unused for years so I thought I would just use that powder and the old 154 Grn. Hornady bullets just to get the feel of the new rifle and scope, and fire form the cases at the same time. Just having fun putting some shots on paper. THEN, I discovered my Hornady Sizing Die, will not size without bushings. I thought since it came with an expander ball it would size like a regular simple sizer die! NOPE, must have a bushing. So, I just got the .314 bushing from Midway . Will Try it this weekend.