Seeking Center X

[truck driver]

I had been discussing this without thinking about taking over Slim Finns 1911 build post unintentionally and have apologize to him for the discourteous intrusion.
So last night I loaded some ammo trying to duplicate IMI load I will use for my long line ( 50yd ) slow fire match at Camp Perry.
The AMU load of 4.3grs of N310 185gr Nosler Competition JHP bullet Virgin Starline Brass and WW LPP. The Nosler bullet is always out of stock so I had to seek an alternate which is the Zero 185gr JHP.
I had previously tried this combination, but it wasn't hot enough to reliably work my action due to the 13lb flat wire recoil spring system that is in my pistol.
Instead increasing the load to 4.35grs I jumped it to 4.4grs and then 4.5grs and head to the range this morning with 10 rounds of each load.
Too hot ( 99* ) to set up the Chronograph so I don't know the velocity of these loads and let the gun tell me what it likes.
Here's a couple of pictures of the results.
The target on the left has 11rounds because I miscounted my primers in the primer tube the one on the right has 10 shots. Mirage wasn't helping matters none with lots of heat waves coming off the concrete walk-in front of the target frame.

 

[Blkram]

Looks like a good start.
Hopefully you can try these loads again on a cooler day and get chrony data, and hopefully better results and info to judge by.

 

[DrMike]

Rodger, you may not consider these competition worthy, but many people would be thrilled with loads that produced such accuracy. For sure, you will want to test the loads for velocity when you are able.

 

[truck driver]

Looks like a good start.
Hopefully you can try these loads again on a cooler day and get chrony data, and hopefully better results and info to judge by.

The only way it's going to get cooler here is for it to snow lol we are under the jet stream heat doom with temps expected around 100 Celsius for the next 4 to five days. It was 99* when I shot toughs groups, 4.5gr is about as high as I will go. Our range has a start time of 0900 and that is when I will try to chronograph these loads and will set up in the shade so it's as cool as it will be and no heat mirage.

 

[truck driver]

Rodger, you may not consider these competition worthy, but many people would be thrilled with loads that produced such accuracy. For sure, you will want to test the loads for velocity when you are able.

Thanks DrMike, the mirage got me on a couple of the 4.5gr shots and would probably have went through the center of the target. I think they are pretty good also, the pistol is doing what it was built to do, seeking center.
The main thing will be trigger recoil management since these will be fired in 5 shot15 seconds for 10 shots total and 5 shots in10 seconds for 10 shots total one handed off hand at 25yds with little room for error.