Comparing those two powders in GRT with the information you provided, it looks like you should be able to get a little more velocity out of N565 at that same pressure level and possibly a little greater case fill. That is using the default powder profiles though which I haven't found to be universally accurate. If nothing else, I bet you don't lose velocity. N565 has performed very well for me shooting in the summer and below zero.
Hammer Hunter Load Data, (See page 1, Post 8)
- Thread starter GLTaylor
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Maverick021485
Member
Thank you for the reply. Do you have any idea about where to start for a minimum charge weight?
just using all default values and profiles, the 69.0gr RL22 load produced 68.5kpsi. That doesn't necessarily mean that's exactly the pressure that your load is at, but it provides a point for comparison to other powders. If I use the default N565 profile, 72.5gr also produces 68.5kpsi. Use that information however makes sense to you. I like to load a couple rounds to do a quick sanity check in scenarios like this where I have zero personal data on a powder, but I have a range in my backyard so it's no major inconvenience to do a quick test.
Maverick021485
Member
I see what you did there! I also agree with sanity checks lol. I'm going to start down at 65gr and work up in .5gr increments. I appreciate your help.
Maverick021485
Member
I also want to throw CAUTION to anyone considering the 69gr. load of RL22 I'm using currently. This load is 1.5gr. OVER MAX suggested by Nosler.
6.5-300 Weatherby
124 HH
26" Wby Vanguard 1:8 twist
2X Wby brass .002" bump, 003" NT, 1/8 T FCD
Federal 215
COAL 3.58"
N570
85.5: 3526 fps
86.0: 3534 fps
86.5: 3552 fps stiff bolt heavy ejector swipe stopped here.
IMR 7828 SSC
75.5: 3328 fps
76.0: 3353 fps
76.5: 3378 fps
77.0: 3392 fps
77.5: 3426 fps
No pressure signs.
Reloder 25
78.0: 3297 fps
78.5: 3312 fps
79.0: 3334 fps
78.5: 3362 fps
80.0: 3381 fps
No pressure signs.
124 HH
26" Wby Vanguard 1:8 twist
2X Wby brass .002" bump, 003" NT, 1/8 T FCD
Federal 215
COAL 3.58"
N570
85.5: 3526 fps
86.0: 3534 fps
86.5: 3552 fps stiff bolt heavy ejector swipe stopped here.
IMR 7828 SSC
75.5: 3328 fps
76.0: 3353 fps
76.5: 3378 fps
77.0: 3392 fps
77.5: 3426 fps
No pressure signs.
Reloder 25
78.0: 3297 fps
78.5: 3312 fps
79.0: 3334 fps
78.5: 3362 fps
80.0: 3381 fps
No pressure signs.
drabdrew
Member
300PRC 26" BBL 9 twist
199HH
2x Lapua Brass
Fed215M
COAL-3.640" 2k jump
Retumbo
80.0: 3072fps
80.2: 3093fps
80.4: 3107fps - 1/2" groups 7-SD
80.6: 3115fps Sticky bolt lift, flattened primer - Stopped here
This is an 80 degree max temperature load. It is also a dang missile strike
199HH
2x Lapua Brass
Fed215M
COAL-3.640" 2k jump
Retumbo
80.0: 3072fps
80.2: 3093fps
80.4: 3107fps - 1/2" groups 7-SD
80.6: 3115fps Sticky bolt lift, flattened primer - Stopped here
This is an 80 degree max temperature load. It is also a dang missile strike
Last edited:
7MM Rem Mag
169Gr HH
Seekins PH2 26" 8 twist
Case - Norma 1X
Primer - Federal 215M
COAL - 3.345
Light Crimp
Powder RL26
Start 61.0 Vel. 2862
End 65.5 Vel. 3005
Load - 65.3 Ave. Velocity 2994 over 10 rounds - ES 13 - Group 1.4" outside to outside at 200y.
Seems to be plenty of room to go to get to pressure, but my goal was 3k fps and easy on the brass.
Velocity measured with Garmin Xero C1 Pro.
Range temps at time of shooting low 50s to upper 60s
169Gr HH
Seekins PH2 26" 8 twist
Case - Norma 1X
Primer - Federal 215M
COAL - 3.345
Light Crimp
Powder RL26
Start 61.0 Vel. 2862
End 65.5 Vel. 3005
Load - 65.3 Ave. Velocity 2994 over 10 rounds - ES 13 - Group 1.4" outside to outside at 200y.
Seems to be plenty of room to go to get to pressure, but my goal was 3k fps and easy on the brass.
Velocity measured with Garmin Xero C1 Pro.
Range temps at time of shooting low 50s to upper 60s
Last edited:
Thank you sir. Also need twist, OAL.300PRC 26" BBL
199HH
2x Lapua Brass
Fed215M
Retumbo
80.0: 3072fps
80.2: 3093fps
80.4: 3107fps - 1/2" groups 7-SD
80.6: 3115fps Sticky bolt lift, flattened primer - Stopped here
This is an 80 degree max temperature load. It is also a dang missile strike
drabdrew
Member
Updated my post. 9 twist COAL-3.640"
Rick Richard
Well-Known Member
7SAUM 22" barrel 1-8 (suppressed)
143 HH
2X fired ADG brass
CCI 250 primer
H4350 59.5
3089.2 FPS
ES 15.2
SD 5.3
Best group at a tad less than half MOA
H4350 60.5 slight bolt lift resistance
H4350 61.0 heavy bolt lift resistance
143 HH
2X fired ADG brass
CCI 250 primer
H4350 59.5
3089.2 FPS
ES 15.2
SD 5.3
Best group at a tad less than half MOA
H4350 60.5 slight bolt lift resistance
H4350 61.0 heavy bolt lift resistance
7RUM, 26" Factory Sendero 9twt.
119 A.H.
Necked down 300RUM brass 3x
CCI250 O.E.M.
COAL= 3.613 1/8crimp 2nd groove
N-165
90gr 3548
91.. 3559
92.. 3603
93 ..3635
94 .. 3690 slight bolt resistance, ejector marks
3 at 93.. 3636,3628,3640 clover leaf.2
Stopped why go any further.
Easiest load development ever.
119 A.H.
Necked down 300RUM brass 3x
CCI250 O.E.M.
COAL= 3.613 1/8crimp 2nd groove
N-165
90gr 3548
91.. 3559
92.. 3603
93 ..3635
94 .. 3690 slight bolt resistance, ejector marks
3 at 93.. 3636,3628,3640 clover leaf.2
Stopped why go any further.
Easiest load development ever.
drabdrew
Member
Does anyone have the updated files?
Post 8 on the first page of this thread. Updated 8/10/24
