ZERO Brand bullets

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I have good results with RMR brand plated bullets.
They seem to shoot well for me. Also had good results with MBC coated bullets.
 
I just got mine yesterday and loaded some up with 300mp ranging from 15-17 grains. I am hoping to get out today to check accuracy. If nothing else, they sure look pretty!

One issue I ran into was that I had to lighten up my crimp a bit from what I usually use to keep the cases from crushing. It seems like the cannelure is a bit thicker than the montana golds I use so it takes a bit more to get the crimp in there good and tight. I do seat and crimp in the same stage and I know the cons of this... This is one con with hard cannelures or using untrimmed brass. I am pretty confident that I got sufficient crimp but the targets will tell the tale.
 
I have just received a few sample 9mm Zero 125gr FPJHP's, and is planning to load them in 357sig.

Before loading a new bullet for 357sig, I always run a few tests to make sure the bullet is loadable in 357sig.

Following are my test results and conclusions:
-Diameter: .3555" - Good
-Average Bullet length: .5298" - On the shorter side but no problem. Need to look into perhaps lowering my COL.
-Ogive not inside case mouth test - used a .861" length case with bullet seated to 1.135". Enough of the trunk of the bullet was sticking out so I can use longer cases and/or lower the COL if needed. Very good bullet profile.
-Plunk test - pass
-Setback test - cycled 2 bullets 4 times through my gun. One bullet went from 1.1355" to 1.1340" which is acceptable. The second bullet went from 1.1350" to 1.1325" which is also acceptable.
-Bathroom scale test: After the setback test I use the same bullets and performed the bathroom scale test. Both bullets were held at around 22lbs for about 5 seconds without any issue.

My conclusion is that I like the bullet profile for 357sig and it passed all my tests I normally perform. These bullets should load well in 357sig.

Now all I need to do is load up a few of them and see how they perform.
 
I was finally able to test the zero bullets I loaded for 357sig, and I am impressed. I have a few different 357sig loads, but decided to start with a more forgiving load, so I started with a Unique load. These loads were tested @15yards using a rest. The best grouping I had was also so the best grouping ever at 15 yards for all my calibers. I really think these bullets are great for 357sig and I will definitely buy some zero bullets when it is time to restock. Following is the load data and best groupng result:

SIG P229 357sig - 1.125" COL - Zero 124gr FPFMJ - 7.0gr Unique - grouping 1.02" @ 15yards.
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I forgot about this until yesterday. I was satisfied with my results but need to retest them. On my first target, I used 15.5 grains of 300MP and shot from a rest at 15 yards. The grouping was just over 1".

16 and 16.5 grains were not great but I need to retest 17 grains (that is the second picture). Those grid marks are 1/2 inch. The problem is that I count 5 rounds within a 1/2" area and then... 2 more. That poses two problems. First, I only fired 6 rounds and there are 7 on paper so someone else helped me out. The second is that I don't know which one is the flyer and whether I just flinched or whether it REALLY was a flyer.

I stopped at 17 grains so I still need to work up a couple of heavier loads.

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