Long range 357 magnum - bullet weight?

[enfield2band]

Thanks for the advice, the long range load would be for the low wall but all I have to test it in at the moment is the 73... I don't want to buy the gun to find I can't shoot it accurately at the range I want.

The muzzle energy limit is 1496ftlb... its primarily a muzzle loader/pistol range.

The Lyman reloading manual details 357mag rifle loads for H110 for 125/140grn bullets in excess of 2,300fps

You don't need that kind of velocity for 100 yards. I shoot on a 100 yard range with a .357". For the lead bullet, 158gr I use 6.8 grains of Unique. The book says the velocity is 1,200fps.
I use copper jacketed hollow point for foxes (158 grain bullet) and I use 7.2 grains of Unique.

Accuracy is good for both loads.

I could swap to a 125 grain bullet for either load and I would expect a velocity of about 1,600fps. Both loads that I use are fine by me so I don't see any point developing another load/bullet combination.

.38" loads in a .357" magnum case are not very good. I have tried them. If you are using a .357" then i would select a load to suit it.

[simgre]

.38" loads in a .357" magnum case are not very good. I have tried them. If you are using a .357" then i would select a load to suit it.

Been loading "special" data in .357 and .44 magnum cases for nearly 30 years now in revolvers, semi auto pistols, carbines and rifles. Absolutely no appreciable difference in either. All things being equal using the magnum cases over the shorter ones give a very slightly higher velocity. May very well be due to the volume of gas that stays within the case prior to movement of the bullet. Has the added advantage of a shorter free bore to the leade and no objectionable ring of residue in the chamber with shorter cases. The final trade off is just a different powder to up the power level.

Aliant 2400 I found best for full house .357 with H110 a close second. Worked the other way round in .44.

[tacfoley]

Been loading "special" data in .357 and .44 magnum cases for nearly 30 years now in revolvers, semi auto pistols, carbines and rifles. Absolutely no appreciable difference in either. All things being equal using the magnum cases over the shorter ones give a very slightly higher velocity. May very well be due to the volume of gas that stays within the case prior to movement of the bullet. Has the added advantage of a shorter free bore to the leade and no objectionable ring of residue in the chamber with shorter cases. The final trade off is just a different powder to up the power level.

Aliant 2400 I found best for full house .357 with H110 a close second. Worked the other way round in .44.

Good post, this one.

Re: .38-55 - the usual bullet for this calibre is a 200 - 240gr Postell-type, but it is a finicky cartridge to say the least. Much experimentation can be needed to work up to a good load, and bullet moulds are not so easy to find this side of the ocean. It really is a long-range shooter - out to 600 yards, with fancy compressed loads of duplex powder, wads and perfect bullets necessary to get good results.

tac

[Simon_S]

I use a 3gr Tightgroup with a 180gr tc in my 357mag very good at 50m but would drop like brick at 100.
3 gr is the start load for 170gr 38spe.

[boff180]

Hi guys,

Thanks for the advice above.

Before I tried different powders, I went down the range today with the Club Chrono to try my standard powder Viht N320.

I tried a number of different bullets with the maximum load and compared it to my usual target load. I did not go for accuracy I was checking velocity to see if it would drop subsonic over 100 metres, hinting a more powerful powder may be required.

The results were as follows:-

Load 1 - Standard Target Load
Calibre: .357 Magnum
Case: S&B .357 Magnum - fired 3 times
Primer: CCI Small Pistol
Bullet: GM Hardcast 158 grain TC
Powder: Viht N320
Charge: 4.8 grains - maximum .38spl load from Viht load data
Rifle: Uberti Winchester 1873 Sporting
Barrel: 24 1/4 inch

Velocity: 1,066fps
Energy: 399ftlb

Load 2 - Maximum Load - Lead
Calibre: .357 Magnum
Case: S&B .357 Magnum - fired 3 times
Primer: CCI Small Pistol
Bullet: GM Hardcast 158 grain TC
Powder: Viht N320
Charge: 6.6 grains - maximum .357mag load from Viht load data
Rifle: Uberti Winchester 1873 Sporting
Barrel: 24 1/4 inch

Velocity: 1,320fps
Energy: 611ftlb

Load 3 - Maximum Load - TMJ
Calibre: .357 Magnum
Case: S&B .357 Magnum - fired 3 times
Primer: CCI Small Pistol
Bullet: 158 grain Total Metal Jacket RNFP
Powder: Viht N320
Charge: 6.6 grains - maximum .357mag load from Viht load data
Rifle: Uberti Winchester 1873 Sporting
Barrel: 24 1/4 inch

Velocity: 1,210fps
Energy: 514ftlb

Load 4 - Maximum Load - Polymer
Calibre: .357 Magnum
Case: S&B .357 Magnum - fired 3 times
Primer: CCI Small Pistol
Bullet: 158 grain TC - polymer coated - green
Powder: Viht N320
Charge: 6.6 grains - maximum .357mag load from Viht load data
Rifle: Uberti Winchester 1873 Sporting
Barrel: 24 1/4 inch

Velocity: 1,310fps
Energy: 602ftlb



Based off this, I think I can see why it isn't doing well at 100 metres.... I haven't ran the numbers in a ballistic calculator but I believe it's dropping subsonic and destabilising.

As a result I've today acquired a tub of H110 and will try again with this project. Hogdon data puts the rifle velocity out of an 18 1/2 inch barrel between 1600 and 1750fps... Lyman has larger loads listed too.

Ta

Andy

[ZaksGod]

just for a comparison in my little .357 1894 marlin with 4.8gr of bullseye,fiocchi primers,158gr hard cast hannam rnfp i get approx 1156 fps.that is the max load in my book.so with your longer barrel and my powder your velocity should be a fair bit higher

[dodgyrog]

Somewhat amused by this as Elmer Keith was driving 44 Magnum 240gr boolits to 400 yards with accuracy out of a 4" revolver. Getting a .357 mag to shoot at 100 yards should be a walk in the park!
Personally I would use a heavy round nose around 170gr (I have a lovely 6 cavity Hensley and Gibbs mould) driven by a healthy load of Alliant blue dot or Viht equivalent (340 I believe). Good shooting.