I would like to know if the Sako 75 action for the 458 win mag will be big enough, mag size and bolt size to make it into one of the other bigger case 458 conversions like Lott or Watts.

We are waiting for the gun license so I cannot look at the rifle myself at the moment to check dimensions as it is at the current license holder.

My friend has a 75 chambered Lott. It has an octagon barrel too, not that it matters. If I remember right a McMillan Bros. stock. Very nice.

I had the bright idea of converting a model 75 stainless synthetic to a 416 Remington. Recoil was significant and in fact snapped the front guard screw twice. I eventually had the original 7 STW barrel put back on it. Good luck with your project. I'm sure it is possible if you use an action from a magnum cartridge but consider adding some weight or a brake.

I don't understand why you take a rifle that has
nothing wrong with it and use the action to make some other caliber rifle. I've not done that. If I want some other caliber rifle I just buy it. It might set me back for a little while
but I will have that rifle.

In a country that is difficult to get a firearm license or rather say just a bloody long wait and where you pay $3000 + for a plain old CZ 550 rifle you make due with what you have unfotunately the rifle will get a different stock on it to make it heavier and stronger.

The Bolt face should be ok, but I suspect the Magazine Box is too short. Another concern is the ejection port being too short to eject a loaded round.

Frederik

458 Win Mag is more than good enough, do not change over too Lott or bigger, it is unnecessary

Safari-Hunt,
What is present caliber and action length of the Sako 75 you are talking about? If it is a v length,375 hnh, you should be ok. I have 3 75 series rifles, one being 375.

I'm sorry I wasn't aware that you have to get a
liesence to buy a rifle. It sure isn't that way
here in the US. We have to have a clean background if not you have to go threw a bunch
bull shit to get it cleaned and then keep it clean. Then you can buy all the rifles you can afford.

I agree with Kwan. A 500 grain bullet at 2150 fps from a 458WM is all you could possibly ever need.

quote:

Originally posted by BigBoreCore:
I agree with Kwan. A 500 grain bullet at 2150 fps from a 458WM is all you could possibly ever need.

With South African Powders "Somchem" to get a load to that figure of 2150 fps is a nightmare without compressing and cannot be done with any mono bullets because of the bullet length.

I dont want to go fast I just need to get to 2150 fps without too much pressure and comfort. And yes I just want to have a round going over the 5000 f/lbs energy level.

What cases do you use ? PMP case capacity is pathetic.
Solution: GS Custom 450gr Solid @ 2300FPS will yield 5285 f/lbs of energy, S321 little to no compressed loads depending on cases.
Even 400gr HV @ 2450fps wil yield 5330 f/lbs... I stopped at 2400 fps.

Just allow 2 months for delivery plus VAT...

I had the same problem with my 458WM, but this solution works for me, rather than going LOTT or WBY.

PS: Winchester, Norma and Hornady makes factory ammo 500gr above 2150 fps.

accit,

That does sound like a plan. I have been looking long at the GS 450's but was under the impression they were going to be long as well ?

What is your OAL on your loaded rounds ?

My magazine is short so 86mm max.

I'll have a look a my load data tonight and post some more detail.

My Sako bullets are loaded to 90mm so you should have plenty space.

You can get those same numbers with 450-grain North Fork solids (Softs as well). Those will fit just fine in your magazine. Better performance than a traditional FMJ as well.

When I bought a Sako in .416 Rem Mag, its stock was significantly thicker and stronger than what I had used before with my .375 H&H Sako. The stock dimensions on the 458 you are looking at will provide for pain where you grip the stock.

If you really want a 458 Lott, you will have to find a Sako in .375 H&H or 7mm STW, then fit a bigger stock for control. The magazine box should be good to go.

After using the Sako as a 458 Win Mag for a while (with the newer "super" bullets, you can rebuild it into a Lott. It will be work, but it can be done. If/when you decide to do that, I have a pattern stock that I made from my old 416 Rem Mag stock. I would be happy to get a pattern stock turned for you for cost. Then a gunsmith close to you could make and fit a stock to your exact dimensions.

Cheers,

LD

Thanks LD I think I will stick to plain old 458 win mag if I go with the 450gr bullets and still get 5000 f/lbs.

Safari-Hunt,

The 458 Win's case has been too small from the beginning to push a 500 gr bullet, especially the longer mono-metal bullets that rob even more powder space.

It is better matched imho with a 450 grain bullet - both Soft and Solid. The 450 gr FN Solid for backup work should be fine - one can get a bit more velocity, and the 450 grainer still has a high SD for a 458 caliber (SD = .306).

The SD is the same for the the 300 gr .375 bullet (SD = .305) and the 286 gr .366 bullet (SD = .305) - all bullet weights that work well on DG.

Just my opinion - the 450 grainer is a perfect match.

Happy hunting
Warrior

quote:

The 458 Win's case has been too small from the beginning to push a 500 gr bullet, especially the longer mono-metal bullets that rob even more powder space.

Warrior

I'd take it that you are NOT familiar with BARNES #4 Manual, or Hornady's #7, or Accurate Arms data, or Hodgdon, or...

Bob

www.bigbores.ca