Mauser VZ24 project: 22-250 to 358 Win ...

[fiver]

that's pretty good.
it shows Boyle's law rather clearly.
and you can see why green-dot is noted for less recoil than red-dot even at the same pressure and velocity.
what else is striking is the difference between bulls-eye and the others especially that trail boss stuff.
if you place those acceleration curves under various alloys you can easily see how powder selection influences alloy selection as far as makeup, and the resistance to acceleration you need, to be successful.

 

[wquiles]

I just realized I should have include Aliant Unique and TiteGroup, as it would be a good comparison.

 

[wquiles]

that's pretty good.
it shows Boyle's law rather clearly.
and you can see why green-dot is noted for less recoil than red-dot even at the same pressure and velocity.
what else is striking is the difference between bulls-eye and the others especially that trail boss stuff.
if you place those acceleration curves under various alloys you can easily see how powder selection influences alloy selection as far as makeup, and the resistance to acceleration you need, to be successful.

Thank you. Been using QuickLoad for a couple of years, and I was "ignoring" a lot of these subtle points until you and Ian pointed out the behavior of the various powders. Man, so little time - so much to learn

 

[fiver]

you just have to break everything down into separate subjects and learn what you can about it, then put it together with some home made observations of each part.
after a bit things start to make sense.

 

[fiver]

oh... if you wanna see something cool run those same powders in the 357 mag case, and compare them to what your getting here.

 

[Ian]

Another thing to do is run them all up to 30,000 PSI in the .358 Win case and see how the shape of the curves differ.

That thing about breaking it down to really think and study each aspect and doing pinpoint tests on all the stuff you read and think about is spot-on.

 

[wquiles]

Well, finally made some new rounds using the Lee 200gr GC PC bullet (yes, the "ugly" PC coated ones!), and went to the range to day to try out the rifle for the first time. All groups shot at 50 yards, from table with bags. COL was 2.495" for all rounds, basically close to/at the lands.

Mauser ready to go. I am using my SWFA 10x "sniper scope" with the side parallax adjustment:



Trailboss supersonic - 14.5gr, about max volume, shooting without the suppressor to get the scope sighted. This is a 5-shot group once I was on paper:



Then moved to subsonic, with TrailBoss, 8.7gr (with the suppressor):



Then GreenDot, 6.6gr (with the suppressor):



And finally Unique at 6.8gr (yes, two shots on top) (with the suppressor):



With the suppressor, it was so quiet, that after the first round of subsonic TrailBoss shot, I removed the bolt to make "sure" the bullet had left the barrel


I am certainly very pleased with the rifle, specially that nice GreenDot group at close to 1/2" at 50 yards. I don't recall ever shooting a 5x shot group this small - ever

Now that the rifle is sighted, I look forward to seeing some 100 yard groups next time

 

[Spindrift]

Very nice results! I'm glad to see your project has worked out so well!

 

[fiver]

i can imagine they ain't too loud with the can off too...LOL.

knowing green-dot like I do I'd probably push a dry patch down the barrel every hundred rounds or so just to knock the fluff around a bit.

 

[Ian]

I tried Trail Boss once, gave the bottle right back to the person who loaned it to me with about 50 grains missing. See why I don't like it?

So those were the "ugly" bullets, eh? Looking real good there! It's cool as heck when you have to pull the bolt to make sure the primer went off.

 

[wquiles]

Thank you guys

For subsonic work, I will keep working with that GreenDot load a little more - the other 5x GreenDot group was not "terrible" - it was about what I got with Unique - so I don't know exactly "why" that one group above was so good. I want to try to see if I can do it again!

I will try some loads at the 30Kpsi range next time as well. Definitely having fun with the 3rd re-incarnation of this Mauser

 

[Ian]

I'm glad it's working out for you. I would have just bought a Green Mountain profiled blank and a chamber reamer, but I think using what you had and letting JES work it over saved you some money and no doubt some time.

 

[fiver]

probably the opposite of why the other wasn't as good.

 

[wquiles]

Stopped by Cabelas and got a pound each of Bullseye and Titegroup

Since the Green Dot at 6.6gr had that amazing group, I am trying 10x at 6.4, 10x at 6.6, and 10 at 6.8gr, so see if it is repeatable or simply a fluke/lucky group. Then I am trying 6.0 and 6.2gr of Bullseye, to complete the 50 subsonic rounds to try - hopefully next weekend

 

[wquiles]

Well, the 6.6gr of GreenDot at 50 yards was not a fluke

Shooting again at 50 yards, 10x scope:



This was the best group at 6.4gr GreenDot:



This were the two groups with 6.8gr GreenDot (5x on top and 5x on bottom):




BUT, that 6.6gr GreenDot still rules them all (yes, 5x shots):





I also tried the two Bullseye groups, but although decent, not as tight as the one above with GreenDot:



I have to load more rounds and visit the range soon. Besides more of these 6.6gr GreenDot, which I will likely try at 100yards for fun, to see how much they open up. Plus I now also have Titegroup which I need to try out as well.

I never had a cast rifle as accurate as this 1939 Mauser in 358 Win, so I am definitely pretty pleased with the rifle and JES rebore

Will

 

[Ian]

PC will sometimes give you that three in one hole, fling two wide thing and it drives me nuts. One day when I have more time I'm going to get back on the warpath to root out the cause.

Seeing the consistency and the patterns from different charges of green dot makes that a very predictable powder in your system, good to see. Hopefully Titegroup won't disappoint, just try to stay around 1000-1050 fps with it.

 

[fiver]

green-dot is a lot like unique.
it has those little spots where your like woah, and those others where your like oh that's so close but not exactly.

 

[wquiles]

Sunday cast - more of the Lee 200gr and the LTB 180gr ...



Casting both molds at the same time, but the Lee is a 6x cavity vs the LBT being a 2x cavity:



I have not sort them yet, but here are the Lee:



and the LBT:



Will

 

[Spindrift]

Nice piles of good looking bullets!

 

[Ian]

Those Lees especially look good.