Author Topic: Need data for cast LBT bullets (Read 712 times)

Ullr · « **on:** March 21, 2003, 10:13:12 AM »

Dose anyone have any experience with loading 45 Colt LBT bullets from Cast Performance Bullet Co? I am getting ready to load some of these for my Ruger RH. The only data I have is from CPB Co as follows.

300 gr LFNGC W296 17.9gr
335 gr WLNGC W296 19.8gr

These are the bullets that will be loading. However this data seams backwards to me. I would think that the lighter bullet should show that larger amount of powder.

If anyone has any loading data and velocities they could provide for these bullets I would appreciate it.

Hcliff · « **Reply #1 on:** March 21, 2003, 12:35:45 PM »

http://www.hodgdon.com/data/pistol/45coltlil.php They have some for the bullet you are asking about. The 335 might have some chambering problems if you have tight chambers. Make a dummy shell first to see if it fits. I think Hodgdon has more listed in their manual.

Another good article is http://www.sixgunner.com/linebaugh/gunnotes.htm#bullet John has some load data and good reading for the Colt.

You will have fun

Hcliff

Dand · « **Reply #2 on:** March 23, 2003, 10:19:00 PM »

I thought Cast Performance website had some load data and Beartooth Bullets site may have some.

Ullr · « **Reply #3 on:** March 24, 2003, 05:51:10 AM »

Yes I found this data. So maybe my question should have been, are similar cast bullets from various makers equal when it comes to loading? My thought would be no. I would thing things like various lube, alloy hardness, contact surface, and many more will change pressure for the same load of powder. Maybe Im too careful here, but I dont like the idea of having to workup a load until it starts to get too high and then back off a little to find the max load for a particular combination of components. How safe is this practice? Once the brass first starts showing pressure signs am I still within safe working limits of the gun or is it already on the verge of disaster?

So far all my loading has been by the book and even though I work up to my max load I still never use the max load in the book. I usually stop just a shade under to be on the safe side.

Hcliff · « **Reply #4 on:** March 25, 2003, 06:37:57 AM »

Yes bullet shape can effect the pressure. I have an old Ross Seyfried article that talks about LBT sty les when they first came out and hoe the pressure was lower than the Keith style in the same weight. The key was that the LBT has more wieght out side the case by it shape design. The bullet size and hardness can also have effects too. The best way I try a new bullet is just to do the old method of trying different charges. I don't do alot of shell in the starter weights. I do like to try that because sometime I have found that the best accuracey is not the barn burner loads but some that are just alittle less. When I used Fusiler cast bullet they could not take as high of charge as my Cast Preformance ones with out higher pressures and harder coming out of the chambers.

I always have the habit like your self to be safe. What does the extra grain of powder gain more pressure but less speed.

If you are intrested in that article by Seyfried I could see about getting you a copy

Hcliff