Ndravetsky
Active member
I'll see what happens this weekend. I have new ADG brass to try.
162 Gr HHT 7mm PRC
- Thread starter Ndravetsky
- Start date
Ndravetsky
Active member
Enjoy your sandwich.
Bleeb
Well-known member
Yes, 2x fired, and the factory load and second load were evidently hot.
I just should have tossed it. I'll be ordering some Peterson Brass. I really liked them in my 340 Weatherby. I was flinging 250gr at 3000fps with no problem.
Bleeb
Well-known member
OK now. This afternoon's ladder test featured Hogdon 4831sc. Temperature was 50 degrees, with a 10mph wind from 3 o'clock with gusts to 20. I used 2x-fired Hornady brass again, and seated the projectiles 73 thou off the lands for a COAL of 3.2790".
63gr - 2923 fps
63.5 - 2905
64 - 2906
64.5 - 2923
65 - 2958
65.5 - 2970
66 - 3009
Then the wind blew over the chrony on the tripod and the screen sidearm broke. Arrrgghhhh!
No indications of overpressure. Typically, I would use 1.5gr less of 4831sc than 7828ssc with the same projectile.
GRT puts me right at max pressure with 66 grains of 4831sc after entering the measurement data. That gives me a 96.9% load ratio and a 97.6% burn, which is more load and less burn than 66.5gr 7828ssc. Sum Ting Wong. Gonna need more boolits!
63gr - 2923 fps
63.5 - 2905
64 - 2906
64.5 - 2923
65 - 2958
65.5 - 2970
66 - 3009
Then the wind blew over the chrony on the tripod and the screen sidearm broke. Arrrgghhhh!
No indications of overpressure. Typically, I would use 1.5gr less of 4831sc than 7828ssc with the same projectile.
GRT puts me right at max pressure with 66 grains of 4831sc after entering the measurement data. That gives me a 96.9% load ratio and a 97.6% burn, which is more load and less burn than 66.5gr 7828ssc. Sum Ting Wong. Gonna need more boolits!
Ndravetsky
Active member
I have new ADG brass. Im hoping i can get out this weekend and see what happens.
Ndravetsky
Active member
OK now. This afternoon's ladder test featured Hogdon 4831sc. Temperature was 50 degrees, with a 10mph wind from 3 o'clock with gusts to 20. I used 2x-fired Hornady brass again, and seated the projectiles 73 thou off the lands for a COAL of 3.2790".
63gr - 2923 fps
63.5 - 2905
64 - 2906
64.5 - 2923
65 - 2958
65.5 - 2970
66 - 3009
Then the wind blew over the chrony on the tripod and the screen sidearm broke. Arrrgghhhh!
No indications of overpressure. Typically, I would use 1.5gr less of 4831sc than 7828ssc with the same projectile.
GRT puts me right at max pressure with 66 grains of 4831sc after entering the measurement data. That gives me a 96.9% load ratio and a 97.6% burn, which is more load and less burn than 66.5gr 7828ssc. Sum Ting Wong. Gonna need more boolits!
Ndravetsky
Active member
That sucks about what happened to your chrono. Looks like good grouping. Im curious how far it would have gone until you saw pressure signs.
Bleeb
Well-known member
I made two loaves of fresh garlic and rosemary ciabatta bread yesterday.
Bleeb
Well-known member
Me too. I have the infrared set for the CED M2 chrony, but I don't want to chance breaking that. I'll wait until it calms down.
Ndravetsky
Active member
Oh man, that sounds terriffic.
Time for a Garmin!!!
My question is why wouldn’t you go with a lighter bullet weight than a heavy for caliber weight. The idea behind hammers is high velocity, large bubble and deep penetration. I would rather see bullet weight that allows 3300-3500 fps, for shock & awe, bang flop! Just my observation.
Ndravetsky
Active member
I want to see how the heavy for caliber perform. I bought a 7 PRC with a 1:8 twist so I could run heavier bullets. I would like to get around 3100-3200 fps. If not I will drop down to the 153 or maybe even 145. My 7 RM was devastating with the 145 LRX at 3050 FPS. Everything was always DRT.
Bleeb
Well-known member
My birthday is coming up.....
Bleeb
Well-known member
I dropped my bull elk at 720yds AMR last November with the 7PRC with pushing a 175gr @2910fps muzzle velocity. Impact velocity was still above 2000fps. DRT. Getting another 150-200fps with a Hammer 162 would be satisfying for me.
Ndravetsky
Active member
Bleeb
Well-known member
Ndravetsky
Active member
Finally got my S*** together today.
The rifle: Bergara B-14 HMR carbon 24 in barrel.
New ADG brass trimmed to 2.375 in. Ran through FL die with .312 neck bushing. Used federal 215 primers. Set neck tension to 0.003in
Measured jam at 3.342in set COAL to 3.320 in.
Used N560
62.0 gr. 2868 fps
63.0 2926 fps
64.0 2984 fps
65.0 3024 fps
66.0 3100 fps
67.0 3143 fps
68.0 3201 fps Slight ejector mark
Ran 3 more at 68 gr. 3218, 3215, 3212
Un able to see ejector mark on these 3.
Zeroed at 100 yds and set target to 200 yds
Shot 1.5 in low. Re-zeroed. First 2 shot 5/8 in 3rd I think I pulled. 3 shot at 200 yd 1.5 in. .75 moa not bad. 55 degrees. 3-10 mph wind left to right. 3700 ft elevation.
The rifle: Bergara B-14 HMR carbon 24 in barrel.
New ADG brass trimmed to 2.375 in. Ran through FL die with .312 neck bushing. Used federal 215 primers. Set neck tension to 0.003in
Measured jam at 3.342in set COAL to 3.320 in.
Used N560
62.0 gr. 2868 fps
63.0 2926 fps
64.0 2984 fps
65.0 3024 fps
66.0 3100 fps
67.0 3143 fps
68.0 3201 fps Slight ejector mark
Ran 3 more at 68 gr. 3218, 3215, 3212
Un able to see ejector mark on these 3.
Zeroed at 100 yds and set target to 200 yds
Shot 1.5 in low. Re-zeroed. First 2 shot 5/8 in 3rd I think I pulled. 3 shot at 200 yd 1.5 in. .75 moa not bad. 55 degrees. 3-10 mph wind left to right. 3700 ft elevation.
