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Who has 277 Fury load data.

46and2

Silver $$ Contributor
I have a 26" 10 twist large shank barrel in 277 Fury(6.8×51) on order along with a few hundred virgin hybrid cases and dies.

Does anyone have any reloading experience with this cartridge or any load data?

I plan on shooting 140 to 150gr bullets. Not at 80k psi. I have a feeling n160 or H4350 will be appropriate but I have no evidence to verify it.

Sierra is supposed to get back with me soon with their starting data...i hope.

Thanks.
 
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46and2 said:
I have a 26" 10 twist large shank barrel in 277 Fury(6.6×51) on order along with a few hundred virgin hybrid cases and dies.

Does anyone have any reloading experience with this cartridge or any load data?

I plan on shooting 140 to 140gr bullets. Not at 80k psi. I have a feeling n160 or H4350 will be appropriate but I have no evidence to verify it.

Sierra is supposed to get back with me soon with their starting data...i hope.

Thanks.
Click to expand...
As you wait to hear back from Sierra, here's some info that you might find of interest to go along with what you hear from them (nothing more than food for thought):
Using case volume of 57.7 instead of QL's default 58.5 H2O
277 Furry - Sierra 140 grs - Powder LIst.jpg
277 Furry - Sierra 140 grs - N160.jpg

277 Furry - Sierra 140 grs - H4350.jpg
 
46and2 said:
I have a 26" 10 twist large shank barrel in 277 Fury(6.6×51) on order along with a few hundred virgin hybrid cases and dies.

Does anyone have any reloading experience with this cartridge or any load data?

I plan on shooting 140 to 140gr bullets. Not at 80k psi. I have a feeling n160 or H4350 will be appropriate but I have no evidence to verify it.

Sierra is supposed to get back with me soon with their starting data...i hope.

Thanks.
Click to expand...

Sounds like a great project. If you don't mind, where are you getting your dies? I hadn't seen any die availability yet, or are you having your dies custom-made?
 
SAM55 said:
Sounds like a great project. If you don't mind, where are you getting your dies? I hadn't seen any die availability yet, or are you having your dies custom-made?
Click to expand...
I'm getting Forster FL size die and lee Dead Length seating die. I already have a micrometer seating stem for the seating die. From Midsouthshooterssupply.com

Lee has a die set but,
I want a "real" hardened size die. Lee isn't really that hardened. But I love their dead length seating dies.
Screenshot_20250730_120921_Chrome.jpg
 
46and2 said:
I'm getting Forster FL size die and lee Dead Length seating die. I already have a micrometer seating stem for the seating die. From Midsouthshooterssupply.com

Lee has a die set but,
I want a "real" hardened size die. Lee isn't really that hardened. But I love their dead length seating dies.
View attachment 1681701
Click to expand...
Thanks very much for the info! Keep us posted on how your project turns out. I'm particularly interested in how the reloading works out.
 
HandgunHTR said:
Interesting that QL assigns 65k as the max pressure. The whole point of the bi-metal case one the Fury is so that it can handle up to 80k.
Click to expand...
Actually, QL does list the 277 Sig Fury at 80K max. But the OP indicated he wasn't interested in loading to that kind of pressure. Therefore I set QL's max pressure at 65K for the powder list to help give him some kind of reference point.
 
This is great! I've been loading deer rounds for the 270 Redding for 8-9 years, (..special order $175 Redding dies,, but almost exact match to the sig fury) and irregardless of the 80k pressures engineered into the Fury combo-metal cases, my fire-formed Lapua 260 Rem brass gets me plenty of velocity and life,
 
46and2 said:
I have a 26" 10 twist large shank barrel in 277 Fury(6.6×51) on order along with a few hundred virgin hybrid cases and dies.

Does anyone have any reloading experience with this cartridge or any load data?

I plan on shooting 140 to 140gr bullets. Not at 80k psi. I have a feeling n160 or H4350 will be appropriate but I have no evidence to verify it.

Sierra is supposed to get back with me soon with their starting data...i hope.

Thanks.
Click to expand...
why buy a ferrari to only drive it below the speed limit...
 
Having necked up my 277 Sig Fury cases to .308 with case volume of 57.7 gr H2O, this morning I tested some H4895 behind some 169 SMK's. Using data for the lot of powder that I had, the velocities came in really close to what QL predicted for me (about 8 fps higher, I think because it was a pretty warm morning at 94°F. . .(summer time in AZ ;) ). For 47.0 grs., case fill at 97.5% with COAL at 2.977", the 5 round average was 2,929 fps (SD: 6.7, ES: 20). . . ~200 fps faster than I normally shoot them in my Lapua brass (26" Krieger barrel). QL estimates the pressure to have been ~73,600 PSI. No problem with extraction, though it seemed it might have felt a hair heavier than previous load. Interestingly to me, this load produced the best print with a .432 MOA even though this is the first firing after sizing to a .308.

Hybrid Case - 169 SMK - H4895.jpg
 
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What action are you using? I am curious which action is rated for a steady dose of 73,600 PSI ammo. Some of the newer customs are built so well that they may be rated for that much pressure. I would be looking for that kind of quality when picking a custom action in the future.
 
Any of the common actions out there will handle this round. Bolt thrust is about equal to any .532"-.550" magnum round. Now if they come out with a magnum sized bi-metal case then they'll be some problems. That's when you go with an 1 1/8" diameter tenon and a .750" bolt diameter with larger bolt lugs. Think Lapua, Norma Mag size action.
 
ebb said:
What action are you using? I am curious which action is rated for a steady dose of 73,600 PSI ammo. Some of the newer customs are built so well that they may be rated for that much pressure. I would be looking for that kind of quality when picking a custom action in the future.
Click to expand...
It's a 2nd generation Ruger Precision Rifle (3 lug bolt) with 12,000+ firings on it.

A while back, someone mentioned possible ringing of the barrel after a few hundred rounds at these pressures (I think it was someone from Bartlein Barrels or Hornady). I'm not sure what it takes for that, but sounds like something that can be an issue for sure with low grade barrels???
 
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Straightshooter1 said:
It's a 2nd generation Ruger Precision Rifle (3 lug bolt) with 12,000+ firings on it.

A while back, some mentioned possible ringing of the barrel after a few hundred rounds at these pressures (I think it was someone from Bartlein Barrels or Hornady). I'm not sure what it takes for that, but sounds like something that can be an issue for sure with low grade barrels???
Click to expand...
Low grade barrels? Please explain.
 
Almost all modern factory bolt actions are tested to 100K or more. Shooting a steady diet of 75K loads won’t hurt them.
I am pretty sure there are quite a few people shooting loads >70K using Lapua, Alpha, or ADG brass nowadays based on some of what is posted here and elsewhere.
 
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