Htc309-153-sp
- Thread starter yodave
- Start date
hometownhero
CGN Ultra frequent flyer
- Location
- Toon Town, Sk
I'm doing the 311-152-sp. Coated and sized to .311" I get 1.5-1.75" at 100 yards with them moving at 1400 fps with no load workup done. Shot from 30-06.
fingers284
CGN Ultra frequent flyer
- Location
- Alberta Cowboy Ranges
One of the benefits of Powder coating is that you can "play" with your final dia. Your method of coating will effect the thickness of the coat. I have found that electric gun spraying will usually leave a much thinner coating than Shake & Bake. I have had finished spray-gun coats end up with a .001- .0015 dia. increase while with most powders using the shake-& bake method I can end up with up to .003" increase.
The super thin coating from the spray-gun is almost translucent on the finished slug but it seems to do the job it was intended for, that being no leading. the only trouble I have had, and that was just recently, was that some of the slugs "scuffed" a bit when running them thru the sizer die. . I have never had a S & B slug scuff during sizing and I've shrunk some of them down .002 or more. I always size my dry-as-cast slugs before powder coating, at least to the desired "finished dia." or .001 thou under sized if I have the appropriate sizer die.
So, in a nutshell you can use powder coating to customize pretty much any cast slug you have around (bumping .452 pistol slugs up to .459 and using them in a 45-70 works beautifully, 1 inch at 100) .
The super thin coating from the spray-gun is almost translucent on the finished slug but it seems to do the job it was intended for, that being no leading. the only trouble I have had, and that was just recently, was that some of the slugs "scuffed" a bit when running them thru the sizer die. . I have never had a S & B slug scuff during sizing and I've shrunk some of them down .002 or more. I always size my dry-as-cast slugs before powder coating, at least to the desired "finished dia." or .001 thou under sized if I have the appropriate sizer die.
So, in a nutshell you can use powder coating to customize pretty much any cast slug you have around (bumping .452 pistol slugs up to .459 and using them in a 45-70 works beautifully, 1 inch at 100) .
I use shake and bake powder coat.
the powder is an Eastwood product (KMS tools)
I size after powder coating using either lee sizeing dies or NOE sizing dies.
I used to size 0.001" or 0.002" over bore diameter, but now I size to the chamber neck diameter. Sized bullets of different diameters are loaded in a dummy case and chambered. The one that sticks gets pulled and I size the bullets 0.002" under that diameter. In my 9.3 x 57 this means that rather than 0.366" (groove diameter) I am sizing to 0.368" and measuring the diameter of the neck of every loaded bullet.
Way back when I started shooting cast bullets in my Parker Hale 303 British with powder coated bullets I discovered that a 0.315" powder coated bullet that will chamber easily will give a slightly smaller group size and more consistent velocities than a bullet sized 0.001" or 0.002" over bore diameter. This means keeping track of your handloads and the diameter of the bullet.
A bullet that is 0.315", chambers easily in my No. 4 Lee Enfield, will not even start to chamber in my 1910 Ross.
Cast bullets and powder coat are a whole new genre and folks are still discovering what powder coat can and can not do.
the powder is an Eastwood product (KMS tools)
I size after powder coating using either lee sizeing dies or NOE sizing dies.
I used to size 0.001" or 0.002" over bore diameter, but now I size to the chamber neck diameter. Sized bullets of different diameters are loaded in a dummy case and chambered. The one that sticks gets pulled and I size the bullets 0.002" under that diameter. In my 9.3 x 57 this means that rather than 0.366" (groove diameter) I am sizing to 0.368" and measuring the diameter of the neck of every loaded bullet.
Way back when I started shooting cast bullets in my Parker Hale 303 British with powder coated bullets I discovered that a 0.315" powder coated bullet that will chamber easily will give a slightly smaller group size and more consistent velocities than a bullet sized 0.001" or 0.002" over bore diameter. This means keeping track of your handloads and the diameter of the bullet.
A bullet that is 0.315", chambers easily in my No. 4 Lee Enfield, will not even start to chamber in my 1910 Ross.
Cast bullets and powder coat are a whole new genre and folks are still discovering what powder coat can and can not do.
