Guide to reloading Bullet Corp Bullets.
Warning: The loads discussed in this guide are my own loads and should not be copied. Do your own load development. Use this guide at your own risk.
Bullet Corp bullets are lead cast bullets coated with Bullet Corp Bullet Coating. It is a newly developed, self-drying, self-lubricating and low smoking protective coating. Equipped with an advanced thermal agent, a high melting point is achieved and the coating will remain stable and intact even with magnum loads. It is also formulated with a self-lubricating agent that reduces friction and prolongs barrel life. Exceptional bonding power ensures that the coating becomes part of the bullet.
Traditionally we have all loaded CMJ bullets from a local company. These have however become expensive to load. This has opened a spot in our market for a new bullet.
Bullet Corp has stepped up and is now supplying us with a more affordable and dare I say more accurate bullet.
So what is the difference between CMJ bullets and Bullet Corp Bullets?
· The main difference is obviously the coating. CMJ’s have a copper jacket plated over the lead bullet…copper as you know is expensive. Bullet Corp removes this cost from the equation. Their bullets are coated as described above.
· Traditionally CMJ’s are sized to .355…our local option is sized to .355. But Bullet Corp bullets and other lead cast bullets are sized to .356. This is the accepted standard for lead cast bullets.
· The ogive of the bullet is different. What is the ogive? This is the curve of a bullet's forward section.
· Cost…say what you want but cost will always play a factor. Shooting Bullet Corp these past few months has saved me some money which has allowed me to shoot more.
These differences should be of note to you, especially the first 3. Now these differences mean you have to adjust your reloading procedures.
You cannot just load Bullet Corp bullets as you did CMJ’s.
Follow these steps to successfully load Bullet Corp Bullets. (Do not add powder or primers to your setup yet)
Flare the case more.
To properly seat these bullets you need to flare your cases more. Not too much but just enough for the bullet to stand on the case mouth without falling over. Too much flare will shorten the life of your cases.
I have found that with my Lee dies I need to set the flare at ½ turn in. Lee Powder Through dies should never touch the shell plate/holder. An oversized expander will help with this process as you prepare the case for the bigger bullet. Most standard expanders are to small for lead bullets and will not expand the case enough for the lead bullet. Seating the bullet in a case that has not been expanded enough will swag down the bullet and will result in gas cutting and leading.
Seat the bullet and check.
Now seat a bullet and check if any coating or lead has been scraped off. Grab your bullet puller and pull the bullet to make sure that the coating is still intact. If the coating has been removed, add more flare. Measure the base, if its been swaged down to .354 you will get gas cutting that will result in leading. Get an oversized expander to prepare the case for the .356 bullet.
Bullet Corps Powder Thru Expander Plugs available HERE
You need less crimp on these bullets as they are thicker than a CMJ. Your taper crimp should just remove the flare and stop set back. Lee Factory Crimp Die will swag down some of the bullets depending on the cases you use and will result in gas cutting.
You can also crimp with a Lee Bullet Seating die, start off by setting no crimp and ensure that the case flare is removed and that you have no setback.
If you do find a setback issue, you can add more crimp. Do this in small steps.
Now again grab your bullet puller and pull the bullet. Make sure that the coating is still intact and that your crimp has not left a mark on the bullet.
This will be a process of try and try again until you find the sweet spot.
Setting your COL.
Due to the difference in the ogive of these bullets you will most likely need to shorten your Cartridge Overall Length. Remember a shorter COL will increase pressure also be very careful to not compress your powder.
Always do a plunk test by loading a dummy round.
A method for measuring the maximum overall length of cartridge for your barrel.
1. Remove your barrel.
2. Measure the length of the bullet
3. Drop the bullet in the chamber and using a vernier caliper measure from the base of the bullet to where the case would sit flush in the chamber.
4. Add the measurements from 2 & 3.
This will give you the maximum length of cartridge for that gun. You have to back off a few thousandths from that length to give some leeway for press variations and variations in bullet length. Assemble a dummy cartridge and make sure the cartridge will load in your magazines. Load the dummy round in your magazine and test for function by cycling the round through the gun.
Here is a story for you about why you need to shorten your COL; late last year I shot a SADPA League match. I was lazy and not in the mood to load ammo. In any case I had a heap of bullets loaded of all the samples I have tested for Bullet Corp. These included 115gr bullets, 124’s, 147’s all different colours and loads. And a few loaded to 29mm…some serious Smartie box stuff. So I decided to shoot these at the League.
On the 4th stage I finished my run and the SO gave me the “unload and show clear” command. As I racked my gun I noticed only the case ejecting and spilling powder all over the show…Now where is that bullet?
Off I went to the safety area and if you guessed that the bullet was stuck in the barrel you win a box of Smarties!
This was one of the 29mm COL loads. Due to the ogive of the bullet, the bullet engaged the rifling and got stuck. So check that COL!
Do you need more or less powder compared to CMJ’s?
Well from what I have found not really. I have compared the velocities achieved with the same load with Bullet Corp bullets and CMJ’s. The velocities are very close.
These are my loads; shot out of my gun over my chrony…do not just copy them. Do your own safe load development.
Somchem S121 Batch 43/18 Deviation -0.8%
Fiocchi Small Pistol Primers
Sig Sauer Sp2022 9mmp/ 3.7inch barrel
Bullet Corp 147gr FN Bullets
Charge weight 3.6grain – Average Velocity 886ft/s
On average 6ft/s faster than my CMJ load.
Bullet Corp 124gr RN Bullets
Charge weight 3.9gr – Average Velocity 946ft/s
Charge weight 4.2gr – Average Velocity 1003ft/s
Bullet Corp 115gr RN Bullets
Charge Weight 4.5gr – 1073ft/s
The 147gr load makes a factor of 130. This has been my go to load for a few years so I did not need a lot of development, just double checking.
None of the other loads would make factor but all functioned the gun 100%.
My new go to load is the 124gr Bullet Corp bullet loaded to 28mm with a charge of 4.2gr of S121, this load factors out of my CZ Shadow but I doubt it will factor out of the Sig, even with the drop in COL.
So in closing…
You cannot load Bullet Corp Bullets as you do CMJ’s.
You need to adjust your reloading setup.
You need more flare.
You need less crimp.
Do not damage the coating! This will cause leading and can increase pressure!
You need to adjust your COL to compensate for the difference in the ogive.
Be safe and work up a new load development.
After you have done the above you will find that Bullet Corp Bullets will save you money and are a pleasure to load…especially the wide variety of colours available!
Loaded 9 mmp bullet corp flat nosed bullets with the new powder through die. after getting the adjustments correct what a oleasure to reload.
Tested them on Sunday at the shooting range worked flawlessly, even so that one of the guys noticed the bullets and enquired.
Recommended he try the bullet corp heads he will not be disappointed
Thanks BULLET CORP Well done
Loaded lots of 9mmP what a pleasure when you have all set up correctly.
Now going to try the .45 Black RN. Eish cant wait.
If I need 135gn (356") will you be able to make them for me???
More. Wil dit probeer. Ek en Riaz is bure hier in New Germany.
Wanneer doen jy n aflewering hier?