New rifle not grouping

[Dan_69GTX]

Perfect!   

[White Smoke]

New replacement rifle arrived yesterday. Cleaned and mounted scope. I have a crapload of ladders loaded up to shoot next week. Using Varget, Benchmark, and CFE223 with Barnes 55 MPG's, Hornady 53 V-max BT's and Hornady 55 SP w/cannelure (2266's) (cheap prairie dog bullet). Probably shoot the MPG's first plus a few other rounds that group well in my AR just to see how they do. I'll probably shoot the 53's and 2266's another day. All of it is just too much for one day. Report on groupings to follow.

[m1a_scoutguy]

It sounds like you are all set and best of luck, I will add that you make sure you try some 77grn bullets, while the ones you have are already loaded and ready and will be good rds to break in and get a feel for your new rifle don't be disappointed if they don't print as good as you would hope although I could be 100% wrong, LOL That 1/7 twist is a prime candidate for the heavy bullets and would be pretty devastating on any varmint. Please keep us posted for sure and will look forward to your results.

[White Smoke]

I just got back from the range. The new rifle really likes Benchmark. I shot two ladders with the Barnes 55 MPG bullet and the Hornady 53 V-max BT. The 55 grain MPG's shot a 0.51" group and the Hornady 53's shot a 0.69" group. The groups on either side of 21.0 grains of Benchmark with the 55 MPG's indicate a sweet spot of around 21.2 or .3 grains. Oh darn. I'll have to load up some more ammo and go back to the range to check it out. It will probably settle in right at 0.50", maybe a tad tighter.

[White Smoke]

I'm lovin' the new rifle. I have several loads shooting under 3/4" and a couple below 1/2". Going to the range tomorrow to confirm two loads with CFE and to shoot a ladder with RL-10x. After a couple of recommendations here, I do want to try some IMR4198. Thanks again for all the help and suggestions.

[Crawl]

The best shooting loads I've ever made (45 grain and 55 grain) for my M700 varmint special used IMR4198.  I tried a lot of powders in the M700.  IMR4198 won out. 

This is my experience also.

Same here.

[mauserand9mm]

I wonder what was wrong with the first rifle?

[White Smoke]

No idea. They only said they couldn't get it to group less than an inch either.

[Joe L]

Good to read that the replacement is working out for you!  I know how frustrating shooting one that has an issue that is beyond one's control can be, that's for sure. 
Joe 

[double-d]

I just got the word this morning. They checked the rifle completely and shot it using Hornady 73gr ELD ammo. It failed at 1.25" MOA. They are sending me a new rifle. THANK YOU CZ!

Colt-CZ to the rescue

[White Smoke]

I have been playing with various loads trying to get a load for the Barnes 55 MPG for the 223. I'm getting 3/4" groups with 24.5 brains of Varget.  I've also worked with the 53-grain 53 Vmax. Today, my buddy handed me three bullets loaded with 26.0 of Varget with the 55-grain Vmax, right at the top end of the spectrum.  I prefer boattails, but tried these. They shot a 1/4",  three shots touching in a perfect triangle. My 308 loves loads right at the very top end. My buddy's 223 is the same way. I'll be back to the range as soon as I can get some 55's , but I am going to shoot them against 53's...and right at the top end. The 26.0 loads showed no signs of pressure. Zero! The CZ's are way over built and will handle 5.56 pressures easily, so that doesn't surprise me. I may have just stopped too low on the ladder and just need to go hotter. Later!

[twentytwocal]

Have the same rifle, ran into this issue twice until I torqued and Rocksett the actual scope mount.

[White Smoke]

I'm checking back in after MANY range sessions with the new rifle.  I've been running through lots of powder and bullets, trying to get a few good loads. I'm trying bullets from 50 to 79 grains and various powders.  I have been concentrating on Varget and H335, but recently went through my powder locker with all the powders recommended by the bullet manufacturer. I got 3/4" groups with the Hornady 55 grain Vmax using 27.0 grains of Varget. Since I live in Kalifornication, I needed a lead-free offering. After trying some Barnes bullets (55 grain MPG's) that my AR loves, I switched to 52 grain Hammer Hunters and tried my usual powders. No luck. Today I revised a load of 25.1 grains of H335 and got a 0.48" group @ 3267 f/s. I then switched to H322 and got a group of 0.54" @ 2982 f/s with 21.5 grains of powder. The third new powder was some Vihtavuori N120 my son uses for his 45-70. I "borrowed" some and got two good groups, one with 19.0 grains and one with 19.5. They printed 0.47" @ 3100 f/s and 0.62" @ 3142 f/s. Life is now good here in Kali.