Lyman 287346

[Marlin Junky]

What do you guys think of Lyman 287346? I've got an itch to buy this mold, a .280 H-R barrel, and see how fast I can make this number go while holding 1 MOA. I think the .280's twist is 1:10" but the grooves are probably fairly shallow; therefore, heat treating 50/50 alloy at 485 to 500F in is order.

MJ

[runfiverun]

depending on it's dimensions 287448 might be a better option.
if you're doing it john's way, it'd be the lighter one anyways.
let us know m.j.

[Marlin Junky]

depending on it's dimensions 287448 might be a better option.
if you're doing it john's way, it'd be the lighter one anyways.
let us know m.j.

I agree but I'm starting 7mm's from square one. I've never owned a 7mm and the Lyman 287346 is the lightest 7mm currently available as a newly manufactured mold. I'll be more than happy if I can get good results at 2600 fps but will need to wait until H&R has some barrels to offer.

MJ

[runfiverun]

b.t.w. most 7's have quicker twists than 1-10
more like 1-9 or 1-9.5
i had to order a douglas 1-10 for my ackley. and it come with 5r rifling super duper accurate with jaxketed but not an optimum cast rifling.
i could go about 2k but the groups just kept on opening up.
an older nei [walt's] 150 does a bit better.
and an aftermarket might be a better option in the long run[ if you can get a built h&r bbl like bulberry does for the contenders.]

[Good Cheer]

You know, I found one of them in a pawn shop, single cavity up in north east Texas. I should go fire it up and stop being neglectful.

[Marlin Junky]

...
and an aftermarket might be a better option in the long run[ if you can get a built h&r bbl like bulberry does for the contenders.]

We'll see how much I like the .280 before investing real money on perhaps an 1885 or #1 with a Krieger barrel. I'll double check, but I'm pretty sure the H&R .280 has a 10" twist.

MJ