Jackmerius
Inactive
Here’s an update, I bought QL to play around with my cartridge and load parameters and here’s what I got. Note, I’m not a pro at this so please help out if you see a mistake.
I decided to use standard AR15 parts to modify since the platform can handle way more pressure than I’ll most likely need. Goal is now to use the 210gr Speer DeepCurl and get it to 2,000fps from an 18” barrel. This should get into the power range of a 30-30. I’ll have a smith shorten and bore out the bolt to make it appropriate for the 410 rim, and have him set the barrel deeper into the barrel extension to correct for headspace. I may have to build a custom ejector that will preload the spring while holding the ejector deeper into the bolt as the front cavity of the bolt won’t be nearly as deep as a stock bolt. Anyway, more on that later... we have load data to work out.
First, I determined my COAL since it is limited by what can fit in the magazine. Then I measured the bullet length and noted both the cannelure-to-tip, and cannelure-to-base. This allowed me to determine the length of the empty shell, and then use the program to estimate the useable volume after bullet is seated.
I also put in .408 grove bore and .409 bullet diameter, which are both just starting points. I’ll have to get more accurate measurements from the barrel when it comes in and consider what the bullet diameter should be. Anyway, probably a good starting point.
Lil’ Gun is still the powder of choice, keeping the lowest pressure compared to other powders (26,871psi/30.5gr Lil’ Gun) while pushing the bullet to 2,000fps from an 18” barrel. I figured if the load I mentioned in post #7 generates roughly 28,000 psi and his primers held up, I should be able to generate that much pressure without primer issues.
I’d like to upload some pictures to show my QL data so you all can provide more input on the parameters since it’s new to me. And I’d like to show progress with the cartridge. What is a good image hosting site?
I decided to use standard AR15 parts to modify since the platform can handle way more pressure than I’ll most likely need. Goal is now to use the 210gr Speer DeepCurl and get it to 2,000fps from an 18” barrel. This should get into the power range of a 30-30. I’ll have a smith shorten and bore out the bolt to make it appropriate for the 410 rim, and have him set the barrel deeper into the barrel extension to correct for headspace. I may have to build a custom ejector that will preload the spring while holding the ejector deeper into the bolt as the front cavity of the bolt won’t be nearly as deep as a stock bolt. Anyway, more on that later... we have load data to work out.
First, I determined my COAL since it is limited by what can fit in the magazine. Then I measured the bullet length and noted both the cannelure-to-tip, and cannelure-to-base. This allowed me to determine the length of the empty shell, and then use the program to estimate the useable volume after bullet is seated.
I also put in .408 grove bore and .409 bullet diameter, which are both just starting points. I’ll have to get more accurate measurements from the barrel when it comes in and consider what the bullet diameter should be. Anyway, probably a good starting point.
Lil’ Gun is still the powder of choice, keeping the lowest pressure compared to other powders (26,871psi/30.5gr Lil’ Gun) while pushing the bullet to 2,000fps from an 18” barrel. I figured if the load I mentioned in post #7 generates roughly 28,000 psi and his primers held up, I should be able to generate that much pressure without primer issues.
I’d like to upload some pictures to show my QL data so you all can provide more input on the parameters since it’s new to me. And I’d like to show progress with the cartridge. What is a good image hosting site?
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