anyone got some loads for 223 using varget+40-45g v/max bullets in a 1-12 CZ 527 varmint

Steve, don't shoot that light of bullet but my 527 Varmint .223 shoots 55 Nosler BT's and 53gr. Sierra match bullets well with 27 gr. Varget using WW brass and primers. Match bullets under .5" and the BT's not far off. I thought the CZ 527 varmints had a 1 in 9 twist? Good luck and good shooting.

Steve, it is a 1 in 9, I have the Laminated Varmint. It's favorite load (oddly enough for a 1 in 9 ) is the 40 grain BlitzKing ( 40 BlitzKings and V-Max's shoot in the same hole in my Hornets and K Hornet) 27.5 grain Benchmark 7 1/2BR Rem primers in Federal Gold cases. Sub half inch at 3,750 ish

I have the same gun as you and the twist in 1-12(I did). Check with CZ about your specific model, there seems to be some debate here that leads me to think something is a bit odd.

I intend to shoot the same powder and the 40 gr bullet, but I'm planning on loading it at about 36,000 to 38,000 fps.

I'll also use a 52 Barnes teipple shock for bigger game (small deer), yes, the tech recommended it for that, I was surprised. The gun is handy and light. I got the prestige grade and it is also pretty.

I think that you might want to reduce your fps John.....

"I intend to shoot the same powder and the 40 gr bullet, but I'm planning on loading it at about 36,000 to 38,000 fps."


If you get any bullet to travel at 36,000 fps out of a center fire or other type of rifle. I hope that there is no one else around. I think that you mean 3,600 FPS instead of 36,000.

I have checked all of my reloading manuals. I can't find a load for anything going 36,000fps. But if you get one to do that let us know what gun, powder, primer, and all other info was used to acheive it. I would love to see what a yote would look like after being hit at that speed.

Ray

even at that, 3600fps from a .223 is cookin'.

"cooking" as in heat.
I've never fired a 40gr bullet thru a .223 but looking in the Speer #13, it doesn't list any loads that would yield 3600fps much less 3800fps. The closest is a load giving 3557fps, which, had the post said 3600fps, I wouldn't dispute, but the speer load was a max load. As in hot.

Bee..., yeah, I thought that was what you meant, I just was not sure . We all have different opinions on what a safe load is, and I'm not going to pretend to be keeper of the truth in this question... Well, now at least you have seen published .223 Rem loads on the other side of 3600 fps - whether this data is realistic, I obviously don't know.
- mike

Yea I would say 3600 is a little to fast my self. I like to load all of my 223's with 26gr of win 748. It ranges to just over 3000 to 3200 depending on the weight of the bullet.

Ray

The Win white box 45gr hp are factory rated at 3600fps, but clocked closer to 3500fps out of my Cooper (24" bbl), so 3600fps with a 40gr is very doable, and "book" loads do exist.
I also use Benchmark in my 223, and it is superb for both accuracy and speed with pills under 55gr.

My dinky 221 Fireball will do 3500+fps with a 40gr on top of Hodgdon's LilGun (their recipe), and the Accurate site shows their 1680 to push one along at almost 3600fps (I use 1.5gr less than max for just under 3500fps).

As usual, your mileage may vary.
No shortage of recipes for the 223!

Check your rifle's twist by:
Start a tight patch; being sure the jag is tight on the rod.
Mark the rod with a felt tip to indicate Top Dead Center and a starting point.
Advance the rod until it comes back to Top Dead Center.
Measure the distance traveled from the start mark. That is the rifling twist, one turn in xx inches.
A lot easier than trying to estimate the amount of twist in a foot.

I have a 1 in 12 twist so I use 55 to 60 grain bullets. I don't know what twist would shoot a 40 - 45 grain bullet.
In the back of my mind I recall reading that velocity over 4,000 fps will take out your barrel in a very short time.

I have the "regular" CZ 527 American, and it has the 1 in 12 twist. I understand that at some point, they changed the twist in the Varmint (heavy barreled) models to 1 in 9.



I use 28.0 gr of H-335 in my CZ with 40 gr Ballistic Tips or V-Maxs. With Varget, I use 27.5 gr with the same bullets. These loads are shown as max by Hodgdon, so work up to them in your rifle.

Let me ask this: what is the advantage of shooting a 40gr ball in a .223??? Other than a boy howdy look how fast I can go, the trajectory advantage just isn't there and the carry up sux. Giving 3600 to the 40gr ball and 3200 to a 55gr ball, the 55gr bullet has a greater sustained velocity at 200 yards than the 40 and actually shoots flatter.

Calif-Hunter....I also load that same 28gr. of H-335 over a 40gr.sierra Blitz King. It chronographs at 3825 fps at 10 ft. from the barrel of a 26 in. WINCHESTER HB with a 1 in 9 twist. dead on at 100 yds, it will hit just slightly over2 in. low at 200 yds. Groups at this vol. are right at .6 of an inch. Haven't shot any 55 gr. stuff for years. I use this combo for PD shooting so I don't have to allow for much drop out to 250 yds.( I don't shoot much beyond that anyway- a waste of ammo) I would also like to see that 36,000 fps hummer( from a long way off). Nice piece of humor Ray,haven't quite chuckling yet.....Ken

The BC of the plastic-tipped 40 grain bullets is close to the BC of a standard 50 gr softpoint--so the trajectory advantage from the increased velocity is real. Out of a 223, the trajectory and wind drift comparisions are sort of a toss-up between the 40 and 50 grain plastic-tip bullets. I make my decision on which to use, based upon the size of the intended quarry.