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Ben Diss

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Posts posted by Ben Diss

    Absolute best electronic scale

    in General Reloading

    Posted

    How many of you guys use a powder trickler for load development with pistol loads?

    I do. When I'm making ammo to test, I check the powder charge of each round. If needed, I adjust it. I use a digital scale too and sometimes it's frustrating. I also have the small Dillon bar scale and I take a small .17 pellet and use it as a standard. I let the digital scale warm-up, and go back and forth between the two with the test pellet until I'm convinced it's working correctly. I find the bar scale to be more finicky than the digital scale.

    I've thought about upgrading, and this one looks interesting.

    http://www.sinclairintl.com/.aspx/sid=71468/pid=38348/Product/SARTORIUS_SCALE_110V

    200 gr Montana Gold CMJ

    in 10mm/40 Caliber

    Posted · Edited by Ben Diss

    I went through this recently in .45 ACP. One thing I discovered is (in .45 ACP at least) the XTP is a longer bullet than the MG jacket flat point I was loading. I have both here and measured them. The MG 200 gr JFP is .540 and the XTP is .568. This means I would seat the MG .028 deeper than the book called for in order to get the same sized combustion chamber as the book expects for it's load data. Loading longer will decrease the pressure and reduce muzzle velocity. Don't know how the CMJ compares.

    RL 550b OAL consistency

    in Dillon Precision Reloading Equipment

    Posted

    I've been using a Redding competition seating die now for a couple of months. Highly recommend it. You will see your variances tighten up a lot.

    I also like the Redding taper die better than the Dillon. No matter how tight you make it, it doesn't look like a roll crimp.

    Neat thing about the Redding seater die is changing between different bullets is a snap with the micrometer.

    RL 550b OAL consistency

    in Dillon Precision Reloading Equipment

    Posted

    I'm using Dillon dies. Ben you'll just have to trust I know how to use this measurey thingy! LOL I checked this micrometer against 4 others and surprisingly they ALL where the same. I did get a slight variance while measuring the bullets. about .01 so I measured a few and put all the ones that were the same in a pile and measured them and the seater plug. They were about .015 off on average. The bullet seems to bottom out on the vent hole in the seater plug. Yes I was putting the round nose bullet in the round nose seater plug. Not really impressed with Rainier bullets right now. :blink:

    You're using a micrometer or a caliper?

    I've measured some Berry's, Montana Gold, Hornady and Speers and I've never seen more than a few .001's difference. What your seeing is huge compared to what I see on these other brands.

    BTW, for that much variance in seating depth, you should be able to see the difference with the naked eye. Put two loaded rounds next to each other on a flat surface and you should be able to spot .020" difference.

    RL 550b OAL consistency

    in Dillon Precision Reloading Equipment

    Posted

    Just to be clear, you're saying that you're trying to get a COL of 1.200" and you're getting anywhere from 1.170" to 1.220"?

    1. Please, I don't mean to be insulting, but I'd like to see a pic of how you're measuring this.

    2. Load five rounds. Measure the COL, pull the bullet and measure the bullet length. Post up the results. Let's see if there's correlation between the COL and bullet length.

    3. Remove the crimping die and repeat test 2.

    .45 acp recipe sanity check

    in 44/45 Caliber

    Posted

    Thanks guys I think I'll just have to break down and buy a chrony to test loads with.

    So anyone have experience with either Shooting Chrony F-1 OR the Competition electronics pro chrono?

    I've got it and have no complaints. It's the only one I've ever had, so I can't say if it's the best one. I do have the interior light kit and it works great. The PC interface is good too. Nice being able to plug into the laptop and grab all the data on a hot firing line.

    Ruger SR 1911

    in 1911-style Pistols

    Posted

    Titanium Firing Pin.

    Thats gun manufacture for lets not put any POS safeties but still make it Cali drop legal. Its what Springfield does. They put the light FP and a heavy FP spring so it won't go boom on the drop test. Then we get them and pull out the Ti pin for a steel one and go play!

    Yea, I don't get this either. I thought a ti pin would reduce lock time?

    Which is it

    in Revolver Forum

    Posted

    Muleskinner, if you already have it, try it. I had a 625 model 1989. I had to change the barrel and then it shot ok, changed it again with a 6.5 inch and that is what I am using now, for a while! :ph34r: Several Left handers on the board and I will let them tackle other issues. later rdd

    What made you want to change the barrel?

    Barries SWC Bullets

    in 44/45 Caliber

    Posted

    Out of all the "plated" bullets, I've had the best results with Berrys, but, make sure you don't over crimp them. They aren't as tough as a jacketed bullet.

    How much crimp do you put on them? I just loaded up a few Berrys 230 plated and crimped to .469-.470. It did leave a ring around a few that I pulled.

    Understanding Crimp

    in 44/45 Caliber

    Posted

    I agree with the 1st 2 lines in your quote. Sometimes- even with a taper crimp though- you will mark the bullet.. not a big deal. I do this all the time even with plated bullet.

    Honestly though I'm surprised at that much velocity difference... the throat tension is what really holds the bullet anyway.

    It also interesting how the lighter loads increased speed and the heavier load decreased.

    This is MY opinion only and is not intended to overrule someone with concrete scientific evidence of the effects of bullet crimp.

    I think of crimp as removing the bell, also (as stated in your quote). I crimp so that each round chamber checks and sort of rounds the sharp edge around the outside case neck and so each round feeds reliably. Removing that sharp edge accomplishes that for me. I don't think of it as cutting into the bullet to hold it there. Unless you're having bullet seback issues, this approach might work for you. Because case length can vary drastically, the crimp can also vary drastically since the die crimps based on contact with the case rim.

    Because of the inherant and uncontrollabe inconsistencies, I rely almost entirely on "neck tension". The .45 doesn't have a "neck" so that term isn't entirely accurate, but you catch my drift. I don't know anyone who trims each pistol case. That is the only way to achieve a consistent crimp. .002" or .003" case variation will not significantly change your coefficient of friction between the case and bullet but those few thousanths could be the difference between crimp and no crimp if you have your die set up to do so. I would much rather round that little edge off and call it good.

    I tested this in an experiment where I drilled holes in bullets sideways and seated them...tied fishing line through the hole and (using a shell collet) pulled each bullet measuring the force required with LabView and the required sensors.

    The cases were of varying length and crimped the same. Other cases also varied in length by the same measurements and did not have crimp applied. There was a spread in each test but far more drastic with the crimped cases. The shorter cases had almost no crimp while long ones had quite a bit. Seating/crimping was done with a lee seating die.

    Moral of the story, use powder charge to control pressure/velocity and seating depth to ensure reliable feeding.

    Fascinating. I hadn't considered case length, but you're absolutely right that it will effect crimp. I measured each round in my test, and found no more than .001 variance, but over several hundred there has to be more variation.

    Can you share some of the results of your tests? What kind of pull forces did you measure?

    Understanding Crimp

    in 44/45 Caliber

    Posted · Edited by Ben Diss

    I'm trying to understand how crimp effects a .45 ACP load. I understand the difference between taper crimp and roll crimp, but I don't understand how crimp effects peak pressure, muzzle velocity, etc. Here's what I've read:

    - try not to think of crimp on .45 ACP and anything other than removing the bell

    - crimp just enough so that the diameter is consistent through the whole length of the case

    - don't crimp enough so that there's a dent in the bullet (if you remove it and examine it)

    - crimp .45 ACP to .469 for lead and .470 for jacketed bullets

    Clearly these instructions are contradictory.

    I've been crimping MG 200 JFP to .471-.472 and today tried .469-.470 (leaving a small dent in a removed bullet) and found that for lighter loads, this increased muzzle velocity 45 fps and for heavier loads deceased MV by 30 fps.

    What gives?

    NYS Rifle Match @Square Deal 4/30 - 5/1

    in Multi-Gun, Rifle & Shotgun Match Announcements

    Posted

    I've registered for this contest and am looking forward to it. This is my first action rifle contest, so I have downloaded and read the USPSA Rifle rules. I'm still unclear on equipment. I want to shoot an AR-15, 20" barrel, compensated. I have lots of questions.

    - I have newer 10 round mags and preban 30 round mags. I don't have a mag belt holster. What mags should I plan on using and how many rounds does a typical stage use? How many extra mags do I start a stage with?

    - I have a 3-12 scope, a 1-4 scope and a JP red dot w/ 45 offset and iron sights. I'd like to avoid open so that I don't end my first contest DFL. What optics should I plan on using. My eyesight isn't so hot anymore.

    - Are the stages typically published prior to the match so one can study them and get an idea on what they're going to do?

    Vortex Razor 1x4 vs SWFA SS 1x4 HD

    in Multi-gun Gear & Accessories

    Posted

    Can't tell you anything about the Vortex, but I bought the 1-4 SS. I got the circle/caps model with SWFA's quick mount. I can tell you that it's a great piece. Everything I've read about others experiences have proven accurate, so I won't go into a full review. The one thing I did, that the other reviews didn't mention is I removed and reinstalled the scope to check that it held zero, and it did. I repeated the test 4 times (at 100Y) and each time I put it back on, it was exactly on target.

    45 acp & 200 gr MG---HELP!

    in 44/45 Caliber

    Posted

    I'm a newbie, so take this for what it is (and isn't).

    I'm loading Montana Gold 200gn FP, using Hornady data. It calls for COL of 1.230. I'm using Titegroup, and their min load is 4.8gn. 100% reliable in my 1911.

    I tested COL with that bullet in my barrel and found that 1.230 is the max length for the cartridge to sit flush. I placed the bullet in a flared, empty case and seated it to 1.3 or so. I used a very light crimp so I could push the bullet deeper by hand. I place the round in the barrel (out of the gun) and pressed the cartridge in until it was flush. Took it out and measured 1.230.

    I also played around with light loads and lighter recoil springs but in the end, I didn't find the lighter recoil worth the loss of grouping and the feeding problems. I went back to 4.8gn making 850 fps. and nice tight groups.

    Alliant's website shows 5.4gn as the min for SWC, but offers no data for our FP 200gn bullets.

    Yea, that's not right. Wish I could edit this post.

    I repeated this test tonight and found I wasn't doing it right. This time, I seated a bullet and made sure the round could be easily removed from the barrel. Seems that at 1.230" the bullet WAS contacting the lands (or was at least beyond the chamber) enough to make it difficult to remove the round. At 1.220" all is well.

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