6.5 prc advice

JP20

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Joined
Feb 15, 2017
Messages
76
So I spent the majority of my day doing load development on my rifle and am looking for advice or thoughts.
Rifle is a seekings ph2. Here are my results. I can't figure out the velocity spike from 59.8 to 60 grains. All bullets seated .015" off the lands

59 grains
Avg 2950
Es 14
Sd 7.4
1.093" group

59.5 grains
Avg 2962
Es 24
Sd 12
.984" group

60 grains
Avg 3061
Es 12
Sd 6.1
1.473" group

60.2 grains
Avg 3080
Es 14
Sd 9.4
.667" group

59.8 grains
Avg 2943
Es 4
Sd 2
.748" group
 

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JP20

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All the notes
 

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Jud96

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Michigan
I would be exploring around 59-59.8 grains. You have a wide window that looks to be repeating in the 2950 range. I would seating depth testing at 59.5 and see how the groups look then. Velocity jumps are normal and you could just be coming out of a “node” when you get over 2960ish.
 

JP20

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Feb 15, 2017
Messages
76
Personally I'd tweak that that 60.2 load. I'm running 140's at 3100 with RL25 and it's semi hot. You are getting good velocity with those 156s imo.

Ph1 6.5prc
You thinking seating depth? I’m worried about making it shorter cause I’m just starting to compress the powder
 

Recon$$

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May 24, 2011
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1,317
Location
MD
At .6 ya, I think your splitting hairs. Personally I call it quits at .5 but I get it for sure. If you can squeeze a little more out of it see if she likes a longer jump. Especially with the conpressed load. I tend to stay pretty close but a few ventures showed me some rifles just like a little space just my 2c.
 

dustbag

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Jul 8, 2021
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WI
I would be exploring around 59-59.8 grains. You have a wide window that looks to be repeating in the 2950 range. I would seating depth testing at 59.5 and see how the groups look then. Velocity jumps are normal and you could just be coming out of a “node” when you get over 2960ish.
^ X2 Seating depth.
 

BrentM

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Jan 10, 2013
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Location
Meridian, Idaho
N565
156 berger
Seekings ph2
Ok, now that i see this…. 2950 is about right. 3080 is too high for that rifle is my guess. Unless you see absolutely zero pressure I think I would explore seating depth. My rifles like 77 thou jump. 2.950 coal. I run 2915 fps in in 22” and 2815 in a 18”. Same jump and they are bugholes.

Also, not sure if this rifle is new but it may speed up with 100-200 rounds down the tube.
 

WTLORD264M

Active Member
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Feb 6, 2013
Messages
33
Location
Louisiana
My PH 2 speed up and settled down a little over 200 rounds down the pipe. 2930 with 156 and Re 26, 2.955", in the .4's when I do my part on bags.
 

SteveBurton

Formerly 'Jackmonkey'
Joined
Dec 13, 2012
Messages
536
Location
Arizona
What primers are you using? How are you weighing your powder? Just curious because 58.5+ grains of N565 is getting into high pressure country for most rifles, especially with magnum primers. 60 grains would be a compressed load in mine with 156s.

With that said, if your loads are safe, I would focus around 59.5 grains. Looks like a good, wide node with those velocities.
 
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