fireman1776
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Posts posted by fireman1776
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19 hours ago, zzt said:
No. Keep using it for crimp only. Since you are new at chrono, the most likely culprit is your chrono technique. To get accurate results you MUST be using a good rest and firing at a target. The bullet path MUST be parallel to the long axis and parallel to the measuring ports. ANY deviation from that path with result in a longer flight time time between the measurement ports, and a lower listed velocity.
I'd master your technique before I went searching for other hob goblins. You may find everything else is fine.
What else would I use it for other than crimp? I’m not sure I’m following?
This most recent time I chronoed I was freestyle without a rest just shooting into a berm. So you may be on to something!
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18 hours ago, cperazza said:
In my experience SD that wide in range will have to do with no enough crimp (0.002") or variations in powder throw (something loose in your set up).
Like the fellas have stated... Do a batch sort same brand of brass, separate the bullets by weight and length, measure each powder throw. A video of the press would also help point out possible issues.
BTW, might have missed it, what chono are you using?
Good luck, let us know how the next range trip goes.
Prochrono dlx
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21 hours ago, Edwards30 said:
I'm shooting the same powder charge behind a 124gr coated bullet out of a legion as well.
My deviation is about 15-20fps using mixed brass. I am using RCBS sizing & seating dies with a regular Dillon powder funnel followed by a Lee FCD.
Do you have any photos of how much your case is belled or what your crimp looks like?I’ll get some photos.
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18 hours ago, iflyskyhigh said:
I used mixed brass and get single digit to low teen SD’s with ES’s of 20-30 all day every day. In everything. From open guns to sun compacts. It’s not the brass.
Powder and primer selection CAN have an effect. But TG at the loading should be fine. I’m guessing it’s your technique, probably powder drop (TG should flow fine out Dillon). With a fast pistol powder like that small variations can make a big difference. But again, Dillon should hold +/- .1, which should not make that big a difference.
Like someone else said, you throw that 998 out and it’s pretty average for 11 shots. You probably spilled a little powder on that one and didn’t realize it.
With cast you may be over or under belling? Inconsistent seating (especially with mixed 9MM brass, which is why I use mr bullet feeder power funnel, really helps with mixed 9MM brass)
Bottom line is large SD/ES is 99% consistency. I know it’s probably not much help, but something in process is inconsistent. Just change one thing at a time. Process of elimination.
The other 1% it can just be a combination the gun, bullet, and powder doesn’t like. For example I’m working on a 40SW load with 165s and HS6. I know for a fact my process is spot on. The charges are weighed to within +/- .05 of a grain. Still getting SDs in the high teens low 20s, ESs in the 40-50 range. Is what it is.
I’ll try being more consistent on my pulls. I’m using the mbf powder funnel and will check about overbelling
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17 hours ago, ChuckS said:
If that Lee die is a Factory Crimp die, swap in a standard crimp die and re-test....
It is a fcd. Is there something wrong with the fcd?
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1 hour ago, Rnlinebacker said:
Range mix brass? What kind of primers? I'm assuming you have a good seating die
Ya mixed brass. Cci small pistol primers. All Dillon dies except for the crimp die which is Lee on a Dillon 750
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I finally picked up a chrono but was surprised to see how much variance I had in a ten round test. I’m wondering if my crimp needs adjusted. All rounds passed case gauge.
127 conical brass monkey bullets over 3.6 TG. 1.150 oal. Shot out of a x5 legion.
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On 5/20/2022 at 11:06 AM, ddc said:
Any experiences with how tight the KKM chambers are cut and how long you can load?
The chamber is supported and much tighter than factory. Rounds jiggle in my factory barrels.
147s I was loading around 1.125
124s I am loading at 1.15 but 1.16 spun freely. Crimped at .77-.78
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On 4/30/2022 at 5:52 PM, RH45 said:
I’m pretty sure that’s shot out of a fixture. I’d be surprised if it does better than 2” at 25 yards, unless it’s oversized, and has to be fitted
I’d rather know pure mechanical accuracy. The human element adds variances. Even if it is out of a fixture I haven’t heard anyone else claim that level of accuracy.
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10 hours ago, HOGRIDER said:
@fireman1776This is all I see under the description on their website:
I'm curious as to how/where you obtained the information in your post?
Thanks!
In an email from KKM after I inquired about their barrels.
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Gx products. Will have to wait but it’s worth it if you can make due.
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Fwiw the new KKM barrels claim a 3/4” group at 50 yards using Atlanta arms 115 grn. The lockup is much tighter than factory barrel and dropped in on my legion.
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On 3/22/2022 at 8:18 AM, Boomstick303 said:
All of my load testing has proven this to be true.
Pretty much.
What type of velocity/pf is producing the better results?
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Thanks all for the input. This helps a lot.
now what’s everyone’s preferred most efficient way of sorting?
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I’m having some issues with certain headstamps in my 750 so I’m going to start sorting headstamps. These were labeled “IK21”.
What are the other headstamps I should look out for.
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It’s not going to help with short stroking, but there is a +power trigger return spring. I am experimenting with one in my backup gun and like it. It’s a more forceful reset.
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47 minutes ago, echotango said:
I received 3 and prefer then much more than the GG GP. Smaller than I thought compared to pics, but the shelf is enough. Fits both our RHT holsters.
I had the GG and only made it through one range session. I would’ve had to change my grip to use it properly. The align was a more natural motion.
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1 hour ago, bulldog009 said:
Sorry if I missed it, but what holster are you running with the Align rest?
GX products Vice
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This video is worth about as much as you paid for it, but I did a comparison with and without using the Align tactical lever. There is a difference for sure.
I’m just a b class shooter so take my opinion as such. It does introduce some other things you will have to work through. The gun returns faster and it throws off the timing. You need to be willing to put in some serious time and rounds in live Fire.
but I like it enough I’ll be buying a second for my backup gun.
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1 minute ago, Boomstick303 said:
I did the same thing with my magwell. If you put JB Weld in those holes and it prevents the magazine from hanging up in those holes during reloads.
I did that also. Here’s the pre dremel magwell. Yes, you get about .5” by opening it up.
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23 minutes ago, X5SigChris said:
I’ve done it to other grips, just not a $300 one lol. There a mental wall here I have to jump across
Just go slow and you’re not going to mess it up in terms of function. It’s a tool. It may not look professional or Instagram worthy but it will be more functional. If it has a gouge in it who cares. No one expect you will likely ever see it.
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It’s a must for me. I remove the top ledge and part of the beaver tail. I also open up the magwell. It’s like adding an actual magwell.
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I think this whole thread begs the question of how much accuracy is good enough for USPSA. The correct answer is probably, "as much as I can get". But we have to balance the cost, at least most of us do. Is 3" at 25 yards good enough for USPSA? I think so. But it's a subjective answer.
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Cross posting my findings
How much variance at chrono is normal
in 9mm/38 Caliber
Posted
What crimp die do you recommend? I have the Lee fcd and Dillon