Yesterday I decided to hell with the heat and loaded up a test series for the .280 Rem., IME7828SSC and the 150 gr. Nosler ABLR. I started the series with 57.0 gr. and went up in half grain increments to the book max of 59.0 gr.I ran each series in three shot groups starting with the 150 gr. Remington factory ammo.
Velocity was 2840, 2352 and 2840 FPS for an average of 2844 FPS.
Test loads:
1. 57.0gr. 2861 FPS avg. ES30 group 1.75"
2. 57.5gr. 2879 FPS avg. ES59 group 1.55"
3. 58.0gr. 2935 FPS avg. ES15 group 1.25"
4. 58.5gr. 2995 FPS avg. ES37 group 1.25"
5. 59.0gr. 3010 FPS avg. ES10 group 1.00"
Decided to shoot up the last five rounds of factory ammo I had with me from a full magazine and found out the ammo binds up and jams the gun. I'll probably take it back to the gunsmith that built it tomorrow. I'm way too beat to do it today. between the heat and my bad knee I'm done for the day.
The whole range session was kind of a wierd deal anyway. I got here at 7 AM when they opened up and until about 10:30 when people started showing up had the place to my self. That almost never happens. I'd also brought my 30-06 to run a load over the chronograph and my custom 7x57 and .257 Bob Winchester Fwt. I wanted to do seating depth test with the .257 and 7x57 and the TSX bullets. Well other than the 30-06 load was a bit disapointing refarding velocity and the .257 Bob shot sub-MOA after the first seating depth tweak (at least that worked out) then things went to hell . The 7x57 has an old original Redfield scope 1.5x5 and the first shot wasn't even on the paper. :shock: At shot number two the crosshair disappeared.
To be fair I bought that thing sometime in the mid 1970's. Oh well.
The wierdest thing though was regardless of the powder charges, ever primer was flat. Some very flat. :?: This was on every cartridge I shot regardless of calliber. Even in the early part of the session when the temp was around 68 or so and it really didn't start to get all that hot until abou 11, give of take a few minutes. I took the last five rounds of factory and loaded the magazine and I got a jam. It's definitely a magazine problem. I've had this rifle for about three or four years and the few range sessions I've always just single loaded it. Never did use it much because it was too heavy (About 10 pounds) Decided to use it for my elk hunt this year because of my eye surgery and while the doc says recoil shouldn't be a problem, I've heard otherwise. Kind of means my .35 Whelen has to stay home.
Paul B.
Velocity was 2840, 2352 and 2840 FPS for an average of 2844 FPS.
Test loads:
1. 57.0gr. 2861 FPS avg. ES30 group 1.75"
2. 57.5gr. 2879 FPS avg. ES59 group 1.55"
3. 58.0gr. 2935 FPS avg. ES15 group 1.25"
4. 58.5gr. 2995 FPS avg. ES37 group 1.25"
5. 59.0gr. 3010 FPS avg. ES10 group 1.00"
Decided to shoot up the last five rounds of factory ammo I had with me from a full magazine and found out the ammo binds up and jams the gun. I'll probably take it back to the gunsmith that built it tomorrow. I'm way too beat to do it today. between the heat and my bad knee I'm done for the day.
The whole range session was kind of a wierd deal anyway. I got here at 7 AM when they opened up and until about 10:30 when people started showing up had the place to my self. That almost never happens. I'd also brought my 30-06 to run a load over the chronograph and my custom 7x57 and .257 Bob Winchester Fwt. I wanted to do seating depth test with the .257 and 7x57 and the TSX bullets. Well other than the 30-06 load was a bit disapointing refarding velocity and the .257 Bob shot sub-MOA after the first seating depth tweak (at least that worked out) then things went to hell . The 7x57 has an old original Redfield scope 1.5x5 and the first shot wasn't even on the paper. :shock: At shot number two the crosshair disappeared.
To be fair I bought that thing sometime in the mid 1970's. Oh well.The wierdest thing though was regardless of the powder charges, ever primer was flat. Some very flat. :?: This was on every cartridge I shot regardless of calliber. Even in the early part of the session when the temp was around 68 or so and it really didn't start to get all that hot until abou 11, give of take a few minutes. I took the last five rounds of factory and loaded the magazine and I got a jam. It's definitely a magazine problem. I've had this rifle for about three or four years and the few range sessions I've always just single loaded it. Never did use it much because it was too heavy (About 10 pounds) Decided to use it for my elk hunt this year because of my eye surgery and while the doc says recoil shouldn't be a problem, I've heard otherwise. Kind of means my .35 Whelen has to stay home.
Paul B.
