7x57, 280, 7x64?

[hoytcanon]

Here is a pic that will further your confusion;

Ruger M77 MKII rifles top to bottom. 7X57, 7X64, .358 and .350 RM.

 

[Hitzy]

Now I'm really confused!!!

Maybe this will help lol

 

[hoytcanon]

If you want to be REALLY cool... I have the reamer and dies for 7.62X57 Medium Mauser... necking down 8X57 with no other changes... will be one of two rifles.

 

[Hitzy]

While the 270 will do most anything the 7's will do, the one thing it can't do is; be a seven. I also am torn between the 7x57 and the 280. I have a 7x57 but often look at it while holding the 280 reamer. So far, it's still a 7x57. In truth, there are few circumstances where the difference would be all that apparent.

The 270 shoots a 7mm bullet which the other "sevens" do not...7.2mm for them lol.
Splitting hairs I know...

 

[Hank44]

If you want to be REALLY cool... I have the reamer and dies for 7.62X57 Medium Mauser... necking down 8X57 with no other changes... will be one of two rifles.

So in the 114 years this case has been around you figure no one else has squeezed a 8mm Mauser down to 30 cal?

 

[Why not?]

If you want to be REALLY cool... I have the reamer and dies for 7.62X57 Medium Mauser... necking down 8X57 with no other changes... will be one of two rifles.

A friend of mine up here has a reamer for the 8X57 necked to 6.5 cal. He uses it in silhouette competition. This is not the more common 6.5X57 which is the 7X57 necked down, but the 8X57, same as yours. The case hold 8-10 gr more powder, depending on density, that the 7X57 case.

Yours will perform somewhere between the 308 and 30-06 when loaded properly.
Ted

 

[Slimbo]

A friend of mine up here has a reamer for the 8X57 necked to 6.5 cal. He uses it in silhouette competition. This is not the more common 6.5X57 which is the 7X57 necked down, but the 8X57, same as yours. The case hold 8-10 gr more powder, depending on density, that the 7X57 case.

Yours will perform somewhere between the 308 and 30-06 when loaded properly.
Ted

So ted, would an 8x57 necked down to 7mm have a similar increases in capacity over the 7x57?

 

[Suther]

I think you get higher sectional density with the smaller diameter bullet (.277 in this case vs .284) when comparing same bullet weights.

You do. The only downside to the 270 is the twist rate on most rifles won't stabilize pills over 150gr (except maybe shorter round nose 160s, but I see no point in shooting round nose bullets in higher velocity cartridges)

 

[Why not?]

So ted, would an 8x57 necked down to 7mm have a similar increases in capacity over the 7x57?

Certainly. The shoulder on the 8X57 is almost a full tenth of an inch further from the base of the case than the 7X57. That is quite a bit of extra volume that can be used for propellant.

My Husqvarna 1600 gets over 2600 fps with 180 gr Nosler BTs, and does so with excellent case life. Of course, European 8X57 ammo has been doing that for years, while the US stuff is barely loaded more than the 30-30. In fact, it is almost exactly the same ballistics as the 32 Special.

Really, the 30-06 is the American version of the 8X57.
Ted

 

[Why not?]

You do. The only downside to the 270 is the twist rate on most rifles won't stabilize pills over 150gr (except maybe shorter round nose 160s, but I see no point in shooting round nose bullets in higher velocity cartridges)

The standard 10" twist stabilizes the 160 gr Nosler partition, and it is far from a round nose bullet. It is also a very accurate hunting bullet to well past 400 yards, the distance to the turkey rail on our silhouette range.

Ted

 

[hoytcanon]

A friend of mine up here has a reamer for the 8X57 necked to 6.5 cal. He uses it in silhouette competition. This is not the more common 6.5X57 which is the 7X57 necked down, but the 8X57, same as yours. The case hold 8-10 gr more powder, depending on density, that the 7X57 case.

Yours will perform somewhere between the 308 and 30-06 when loaded properly.
Ted

Ted, that is why I chose the 8X57 necked down with no other changes... I wanted to use the X57 case in .30 cal to it's fullest potential, while at the same time simplifying the brass process... John Whidden made the dies for me and Dave Kiff made the reamer... my rifle is an M77 MKII. You are correct that it falls between the .308 and .30/06, but closer to the .30/06 than the .308, in priliminary testing... I am still working up loads and it has not seen the field yet.

 

[Suther]

The standard 10" twist stabilizes the 160 gr Nosler partition, and it is far from a round nose bullet. It is also a very accurate hunting bullet to well past 400 yards, the distance to the turkey rail on our silhouette range.

Ted

The 160 partition has a lower bc than the 150. Combine that with lower muzzle velocity and the 150 wins at all ranges IMO. Not that game would know either way. Lol

 

[Why not?]

I was commenting on your post that the twist was too slow to stabilize 160 gr bullets unless they were round nose.

Ted

 

[Suther]

I was commenting on your post that the twist was too slow to stabilize 160 gr bullets unless they were round nose.

Ted

Well the 160 part is a "semi Spitzer" according to nosler, so it's somewhere in between Spitzer and RN. It's also shorter than the 140gr accubond, so let's say we're both right? Lol besides this is supposed to be a thread on "7mm" calibers, not calibers that ACTUALLY measure 7mm. Lol

 

[bassman]

Agree with all the above. I have 7 7x57's because they're classy. 7x64 for the extra range of which I have 3 (no Mr Hotycanon it ain't comin' back. I like it too much) LOL
Just snagged a ZG47 in mint condition in 7x57...oops sorry that's 8 now!
7x57 has go to be one of the most balanced calibres there is. Kilimanjaro Bell smoked over 1100 elephants the majority with the 7x57!
I have a 270 but prefer the 7x57. Better bullet sectional density.
A man with a 9.3x62 & 7x57 don't need anything else, but we're all Gunnutz so to each his own!
Got me an 8x68S too Markus!

'Karamojo' Bell

 

[cdn shooter]

How about a 7x61 S&H

 

[Slimbo]

Good suggestion, but I'm looking to keep a standard bolt face and 5 in the mag.

 

[flashman2]

7x57 is pure class, but the loads for factory are limited, and it pains me to say it seems to be getting very hard to find. That said everyone needs a 7x57.

If you're limited to factory, Trade Ex has good stocks of x57. Order a ten year supply and problem solved.

 

[c-fbmi]

I used and liked the 7X68 Imp a lot...........I also have 7-08s, 7X57s, 7X64, 280 Rem, 7mm RM, 7mm Wby, 7MM RUM, 7mmX300 WM, had a 7mmX300 Wby and a 7mm TCU. You will find little difference in the 7X57-7X64-280R when loaded to equal pressures in modern rifles.

 

[Hitzy]

7mm Gibbs.... about as much powder as you can fit in a 30'06 case and seat a bullet.