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Got my new 280 up and running, and actually hit the range yesterday.

First shot out of the bag was a ladder of RL19 and 140 Accubonds, seating them .005 off of the lands.

Velocity results were as expected, accuracy left much to be desired.

I know the build will shoot, so I am thinking I need to try faster and slower burn rates than RL19 to see what it prefers.

How about this : H4350, H4831SC or RL22 ???

Don't have much IMR 4350 or 4831...

What say yea ?

TIA,

Tony

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Terry,

If you have any on hand, give 7828SSC a go. Stellar performer in a couple of .280s for me with 150 grain bullets.


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I actually do have 7828SSC...care to share what you are shooting ??

TIA,

Tony

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Tony, (apologies)

In three Winchester 70s I've worked with I shot the 150 Ballistic Tip. Start at 58.0 and work yout way up to 60.0.

All the rifles I worked with took 60.0 with no signs of pressure over a chronograph.


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I've had good luck with H4831SC and Sierra 160 gr gamekings, and RL22 with 139 and 154 Interbonds....


Regards,

Tom
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I this particular rifle build, I am thinking that slower burn rate might be better...

Tony

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Barnes 120gr ttsx over 57.0 grs of RL-17 Federal case WWLR primer. Perfection in my Rem mountain rifle.

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H4350 in the 54-55 gr area should be good. AB is one long skinny bullet. Seat mine max for magazine in my pre 64 and still a long jump to the lands in this rifle. Shoots well less than MOA so much for seating depth.

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56.5gr IMR4350 with 140gr TTSX and Sierra PH, and 60gr IMR7828SSC with 162gr A-Max. Brass is on its 10th loading and still going strong...

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I like 50.8 of RL 19 with 154gr SST's

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What are most using with 140's?

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RL-22 is always #1 for me with any bullet over 100 grains; 7828 SSC has also done very well, but really, I've never seen '22 not work across a half dozen 280's.

Have also done some recent work with Win 780 & it looks good so far.

MM


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IMR4831 55-56gr with various 140's has been a solid performer.

IMR7828ssc with 150gr and heavier.

RL19 and RL22 were both accurate but not very fast for me compared to other powders.

Don't give up on the load you are using. I just think that you are way too close to the lands for that rifle. The Accubonds act like monometals in some rifles and like a decent jump into the lands. I have two rifles that show this. One is at .086" off due to magazine length, the other is at .084" because it shoots the best there. Both rifles are consistent 1" and under shooters for me and have shot several 3-shot groups in the .3's.

I would back them off to at least .030" to start with.


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Thanks for the advice..

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I like the 154 Horn in my M70 Fwt

50.5-51/I4350 will be a sweet spot..get the best load and then fool with seating depth.

Contrary to Goose, mine likes it close .oo4-.005 off.

53.5/R19/160NP also likes it close.. .004 off

No experience with R22 or AB's, but 2 here like it and you have R22. So for me I would start like Goose says, get the best load, and work the depth with .005 increments.

For some reason I seem to have more trouble developing good loads in the 7mm's, and for me that is the 7-08, 280, 7x57, and the 7Mag.

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Originally Posted by h0ok
Barnes 120gr ttsx over 57.0 grs of RL-17 Federal case WWLR primer. Perfection in my Rem mountain rifle.


My .280 likes 58.0gr of RL17 and the 120gr TTSX.


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What kind of velocities are you getting?

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Hicounty, the .280 is not much different than the .270. Both do well with the 4350's and the 4831's especially with the "lighter bullets". If you were thinking 160gr. bullets, then IMR7828 and R22 might be a good idea. But I've seen rifles that broke all the rules about what was supposed to work.

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I use 59 grains of H4831 behind a 120gr Nosler Ballistic tip, never had a white-tail take more than one step. Shot a 175 pound doe this fall at 325 yards, fell right over, it never new what hit it.

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RL22 is first, last and always for me in the 280 Rem with 140's.




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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