300 WM with 215 Hybrids

[Deton8tor]

Just had my .300 WM re-barreled with a Bartlein 1:10 5r, 26", chambered to shoot 208's up. I only shoot steel, but out to 1000. Question is, are the Berger 215 Hybrids tough to tune? Looking at those as well. I currently shoot 210 MK's, but they like to be long, right in the lands. If I move them back the groups open, and they are pricey. Anyway, any input is welcome. Thanks for the reply's.

 

[Alex Wheeler]

Not at all. Start them .010" off the rifling and work powder charge. I like H4350. Then go back and fine tune seating depth.

 

[Gb300wm]

My rifle loved H1000 with these bullets just on the lands and Retumbo with the 230's.

 

[LoanHarvey]

Just had my .300 WM re-barreled with a Bartlein 1:10 5r, 26", chambered to shoot 208's up. I only shoot steel, but out to 1000. Question is, are the Berger 215 Hybrids tough to tune? Looking at those as well. I currently shoot 210 MK's, but they like to be long, right in the lands. If I move them back the groups open, and they are pricey. Anyway, any input is welcome. Thanks for the reply's.

I just dialed in my 300 WM, same set up as you, but a Krieger barrel. The 215's are at mag length, and .040 off the lands. They love H1000 loaded at 78.5gr. Velocity is 2966 with a S/D of 7.
Shoots a clover leaf the size of a dime at 100, 3" group at 400. Just shot her at 1000 at a gopher mound and hit it 10 out of 10 times. Pretty fun stuff!!

 

[fredo]

I shoot the 215Hybrids in a big .30 cal wildcat, and found them very tolerant. Started 'em with a mild jump and haven't needed to tune much at all, just stoked the coals to hit a node within a desired speed window. Spooled up to 3150, they're beyond impressive at distance...

 

[Deton8tor]

Holy Cow, fredo, that is smoking. I am very anxious to get started on these.

 

[Phil]

Fredo has a big wildcat for those speeds....lol....


Phil.

 

[Deton8tor]

I did some load work up with the 215's, got a pleasant surprise. 30 thou. off the lands gave a .214 group at 100. Reloading new batch to go 300 & 600. I sure hope it holds. No info on velocity yet, I want the accuracy first.

 

[Zero333]

[QUOTEShari g 350, post: 36770786, member: 1277850"]I did some load work up with the 215's, got a pleasant surprise. 30 thou. off the lands gave a .214 group at 100. Reloading new batch to go 300 & 600. I sure hope it holds. No info on velocity yet, I want the accuracy first.[/QUOTE]

Mind sharing your load data once you confirm it's a consistent load ? Brass, powder, primer etc...

 

[Deton8tor]

Loan Harvey and Zero333, sent you a PM with info on the 215's.