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Off to the range with new Yost custom 10mm

Discussion in 'Handguns: Autoloaders' started by Bob R, Oct 30, 2005.

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  1. Bob R

    Bob R Member

    Dec 26, 2002
    The Dry Side of WA
    I finally got a couple of hours today to hit the range. All I wanted to do was to make sure my new Yost-Bonitz Delta ( http://www.thehighroad.org/showthread.php?t=162510 ) ran like a swiss watch.

    The temp today while there was about 45 degrees with the wind blowing right to left at about 12-15 miles an hour. That barely qualifies as a breeze up here.

    I started out by loading up my 5 Colt mags with American Eagle 180gr FMJ. It went through the 5 of them without a hitch. Slow fire, rapid fire, it ate it all without a hiccup. The trigger has a tiny bit of takeup, followed by a crisp letoff at about 4 lbs, just estimating. I don't have a trigger gauge. The sights were dead on from 7yds to 25 yds. The beauty of a flat shooting round. It has the Novak front sight with a gold inlay in it. It picks up the light very well in low light situations, and blends into the sight with high ligt. The rear is a Novak adjustable, they provide a very clear sight picture for these tired old eyes.

    After running 100 rounds of the American Eagle through it, I switched over Double Tap 180gr Gold Dot JHP. It is a definate step up in power. The recoil was very managable, with the high cut front strap and minimized beaver tail the recoil pushed up more than snapping up. It was with the Double Tap I started having problems with FTF's. Out of 50 rounds, I had 4 FTF's, the nose of the bullet was pushed into the ramp, rather than feeding up the ramp. I am not real happy with that.

    I then switched to Double Tap 165gr Gold Dot JHP and had a repeat of the problems that I had with the 180gr. It was not limited to any one magazine with either ammo. I had several FTF's, with the nose of the bullet hitting the bottom of the feed ramp. I also had a couple of times that the slide failed to lock back after the last round when using the Double Tap.

    The gun is very accurate. It has a Scheumann Ultimatch barrel. I don't know if I will ever be able to shoot to the capability of this gun. I will let you know in about 10 thousand rounds. By then I should know.

    Now, what is my next step? Well, the FTF's are concerning to say the least. I am going to replace all of my mag springs for starters, and then get a 24lb recoil spring to replace the 20 pound one that is on the FLGR now.

    After that is is back to the range to make sure it works, every time. Until then I am not going to carry this gun. I am sure with the mag springs and heavier recoil spring the problems will be solved.

    This is my last mag from 25yds, I pulled one left at 9 o'clock just off of the target. This was the 165gr Double Tap. I need to practice, or get out of the wind, or maybe a little of both.


    My little range.


  2. agtman

    agtman Member

    Dec 31, 2002
    Thanks for your report.

    Sorry to hear about the repeated failures-to-feed. They could be resulting from the mag spring not being strong enough to push the rounds up in time to catch the slide correctly. Replacing them with Wolff XP mag springs should correct that.

    Never had any FTFs in my Delta, regardless of recoil spring weight, but slowing down the slide velocity generated by hot 10mm loads, like Double Tap's, couldn't hurt. I currently run a 22lb Wolff recoil spring on a FLGR, along with a shock buff. It also runs fine with a 24lb spring (depends on what loads I'm shooting).

    I've tried a lighter one, a 20lb spring, but with the upper mid-range to hot loads that I typically shoot I was getting concerned about slide velocity. I feel the 22 & 24lb springs work fine for my needs.

    You have a nice looking Delta. :cool:

    Hope this helped. Good luck.

    HSMITH Member

    Dec 26, 2002
    Bob, I would bet the problem is mag springs. IMSI makes the best springs in the gun spring business, some of them should take care of you.

    I like a fast slide, I would put a buffer in it and stick with the 20 pound spring I think.....
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