I just bought a Lee "U" die for processing some mixed headstamp cases. Some which show the glock bulge. I heard this would do a good job of removing the bulge. Im guessing about 10-20% of the cases were shot through a glock, because after running it through the "U" die, the results were less than desired. The die shaves off a crescent shaped piece of brass, shaped about 1/2 the circumference of the case. The case is left with a very clear ridge you can see in the pics, you can easily catch your nail on it. I would contact Lee, bu they have removed their phone number off the website.
Any thoughts?

Quote from: Muskrat on August 15 2020 10:37:53 PM MDT
Cast bullets generally have less drag that jacketed bullets. But they have the potential to seal the bore more tightly, thus increasing pressure. If the barrel/bullet combination causes excessive leading, pressure can increase as more bullets are fired. The true diameter of the barrel and the bullet and the powder charge has a much greater influence on pressure with cast bullets than with jacketed bullets, and every barrel and bullet combination is unique.

It probably doesn't make a huge difference until you get to the top 10% of a load, but at that point things can change rapidly, and the built-in safety margin of published jacketed data is no longer working for you.

On the plus side, Longshot is a good powder for heavy cast bullets, and cast bullets are usually slightly shorter than jacketed bullets of the same weight, so at a standard COAL the cast bullet will fill less of the cartridge volume than a jacketed bullet, which reduces pressure.

I guess the whole point here is that you cannot use jacked load data for cast bullets and still have the same safety margin. Pressures might be about the same, or a bit higher, or quite a bit higher, depending on several factors...bullet and barrel diameter, bullet hardness, powder load, primer, crimping technique, etc..

So start low, use a chronograph, label and save your brass so you can compare the brass from load number one to the brass of loads two and three and four and five, and you'll figure out when to stop before anything blows up.

The loads might end up mirroring published data for jacketed bullets, or they might be quite a bit different. You won't know till you get there.

Thank you for your time explaining. Thats good info.

Quote from: Muskrat on August 14 2020 09:07:15 PM MDT
My experience has not been the same.

I'd reduce by 20% to start and go slowly. Lots of variables with hard-cast bullets that simply don't come into play with jacketed bullets.

Thanks for the replies and advice.
Would that be mainly due to additional drag in the barrel? Any other variables you could describe? Any idea how much of that drag is countered by the Molly coating?

So I see data for 200 gr jacketed, but not hard cast. I have access to Longshot and would like to use it. Can I use the data for the jacketed? Any data specifically for 200 gr hard cast and Longshot?
Thanks!

Im trying to find info, and the search function is not helping. It seems to me, that If I have my g20 slide and barrel ported, I will be loosing velocity as well. So if a 4.6" barrel is ported, say, 1" back from the muzzle. Then doesnt it effectivly offer the same velocity as a 3.6" barrel? Seeing that the the expanding gasses stop pushing the bullet at that point and start exiting the ports to comp for muzzle rise.
Now, If I want to maintain the muzzle velocity of the stock length barrel and reduce muzzle rise, I think I should opt for the extended/ported barrel. Is there a substantial reduction in muzzle rise? Im shooting 200gr hard cast, 1100fps loads, having a hard time getting a fast followup shot.

So I recently ordered some 200gr TC hard cast from Rim Rock Bullets: https://rimrockbullets.com/xcart/-40-10mm-200-gr-tc-the-outdoorsman-per-500.html
I had some specific load data from Accurate using #9 and this bullet. In the process of deciding which bullet, I came across this mystery. The shape of the TC looks identical to the shape of many FP bullets like these 220gr from SNS Casting:http://www.snscasting.com/40-s-w-220-grain-flat-point-red-coated-500ct/
Or these from Badman Bullets:https://www.badmanbullets.com/OnlineStore/products.php?cat=40+200+Grain+FP
Here is what I thought a FP would look like:http://www.acmebullet.com/bullets-reloading-brass/40-10MM-Lead-Hard-Cast-Bullets?product_id=510
But maybe that should be called a LRN-FP? Like this:https://ammo.com/bullet-type/lead-round-nose-flat-point
Thoughts? Is they interchangeable when it comes to load data? Why different terms if its the same profile?

Hi all, im a freedom fan, live in northern New Mexico. Love to shoot and reload, hike, backpack, camp etc. A few months ago I picked up a g40MOS with a Leupold reflex. It was super accurate, but to be honest didnt care much for the ergonomics of the gen 4. Also the 6" barrel is tough to draw quick from my Hill People Gear heavy recon kit bag. Anyway, I successfully traded it yesterday for a G20sf gen 3, im in heaven! Looking for info to load 200 or 220 coated hard cast for bear and cats. Anyone else here in NM?