cast bullet load for 9.3x62mm mauser

[dh2]

I have a mold ordered for this rifle for a 285 Gr. flat point gas check bullet, Looking to cast it out of Lyman #2 alloy or linotype
but I have not found any published data for this cartridge with any cast bullet. What I am trying to find is a load going from 1500 to 1700 FPS with IMR-4198 or SR-4759. Idea's I am looking are so far
1. Use the starting load for a heavier bullet load. like 300 gr bullet
2. H4895 max load times 60% and work up
3. By Hodgon web sight use Trail Boss powder fill the case with powder to base of bullet weight it and start with 70% as the starting load.
I have always been very much on believing if it is not published don't shoot it, so my own load forming to this point is new to me.
I am open to ideas and experience form others and Quick load data.

[sthwestvictoria]

For my 35 whelen 250grain cast loads I used the Hodgon 60% and worked up as the Lyman 4th Cast Handbook only gave data for 190 and 200grain projectiles. This worked well for me. I actually used a combination of the the Hodgdon rule and the Lee 1grain reduction method to get to a ball park velocity and then started loading.

I just had a look and there is no cast data in the 4th or 3rd Lyman Cast Bullet books for the 9.3x62mm.

I am sure some one with direct 9.3x62mm experience will chime in. No great need to use Lyman #2, normal Wheel Weighs will do fine. What size gas checks does the shank take?

[dh2]

I don't know yet about the gas check shank size yet, waiting on the mold , I ask Sage's Outdoors and they sent two samples both for 9.3mm not the normal .375 they are different thickness of metal they are made of my mold should be here by the end of the mouth and I will find out which one works best there is a lot of learning going on with this round, so far a lot of learn as I go.
What is this Lee 1grain reduction method ?

[sthwestvictoria]

What is this Lee 1grain reduction method ?
In the Lee Modern Reloading 2nd Ed book, Richard Lee provides a method of reducing jacketed data. He does this by providing a reduction factor that you multiply the jacketed data by for each one grain reduction. For example if the Load for 250grain jacketed is 60grains of powder ABC for 2400fps and the reduction is 0.994. you multiply 2400x0.994=2385fps at 59 grains. then multiply 2385x0.994=2371fps at 58grains then 2371x0.994=2357fps at 58grains.
So you continue down the page until you arrive at the rough velocity you are aiming for then start loading. I feel safe using this method with H4895 only as we know that Hodgdon tell us it is safe to reduce up to 60% of max jacketed data. In real life you will experience position sensitivity before this.
For the Whelen I arrived at a start load that was at 74% of jacketed max. Therefore I felt safe to start loading. I then worked the load up and it is currently at 74% of jacketed max for H4895.

The Lee book is useful. The 1grain reduction method is not the be all and end all and I would not use it with powders slower than H4895, some people may. Many people disagree with Lee and cast bullets but his information is useful if you see it as just part of the puzzle and bring in other information. His book is low priced and easily available.

[samwithacolt]

I will be doing load development for my 9.3x62 husky this summer. I have a NOE 280 gr, with a 375 gas check. I hope to get about 23-2400 fps, or as fast as I can comfortably shoot. This will be my moose gun this year.