I couldn't help myself. I saw a blank on the database and had to examine what was in this load.
I recently had knocked down the UW 155g XTP after it produced some pretty pronounced smiles and found Longshot (I believe) instead of the 800X of old. I certainly expected the same in the Nosler 150g load. NOPE!!!
The 150g had 800X in it. I measured 10.7g, and since the rest of the 150g-155g showed 10.8g in Shadow's tear downs, I checked a second round. This time it was 10.4g. I was a bit disappointed to see that large of a varience, but 800x does measure like cow pies.
That prompted me to take a second look at the Longshot load in the 155g XTP. The first time measured 10.5g. I tore a second one down, and this one measured 10.7g.
Part of me wants to knock down more to see what the max difference is, as I'm a bit disappointed with Ammo that has seen a continued upward price pressure. What makes me uncomfortable is that the ammunition is loaded close to the edge, and .3g could make a difference in chamber pressure. With Intercooler's squib breaking his Hunter, I'm wondering about the quality control at Underwood.
I think I'll just develop my own loads and stick with the handloads, putting the savings into something else.
Greg
Thanks for sharing the info, I'd still would be interested to know where these rounds are pressure wise. I know the impulse is higher and the stretching of the brass to the point of "smiles" does raise some concerns.
Yes, handloading your own, sure has benefits of your personal quality control. I see a lot of progressive press users wanting to load the upper end, if they are using powder droppers and not measuring each and every load, they too will see variations in their powder charges. The difference is dependant of the powder of choice and how the powder drop handles each.
When I put stuff together I still hand weigh each and every load, because I can, and I know they will be almost exactly the same, to less than a 0.5 grain, only because the beam scale's settings. Using the trickler I get down to where a few flakes will make it balance out. Some say you don't need to be that close, that maybe so, but I'm obsessed...
I would suggest sticking to the Delta Elite load, or the 165 tmj which so far we haven't had any complaints on (as far as I am aware).
Quote from: 4949shooter on April 13 2014 09:43:54 AM MDT
I would suggest sticking to the Delta Elite load, or the 165 tmj which so far we haven't had any complaints on (as far as I am aware).
Or just shoot them through the Witness.
Glock with the 155XTP (7 of 17 retreived cases smiled)
(http://www.spanielsport.com/photos/i-vFmRMgg/0/XL/i-vFmRMgg-XL.jpg)
I fired rounds from the same box of ammo through the Tanfo and there was no need of a picture. There were no smiles in 12 retreived cases. There were no real signes of pressure at all. It just handles the pressure better.
Greg
I went ahead and knocked down another three of the 150g Nosler loads for a total of five rounds. Charge weights are in order of teardown
10.7g of 800X
10.4g
10.5g
10.4g
10.6g
Greg
It should be on the sheet. I Chronographed them and sent to The Shadow... maybe I missed it?
The Underwood 155g XTP in order they were weighed.
10.5g of Longshot
10.7g
11.0g
11.0g
11.1g
I'll admit the 10.5g wasn't with the most care. Still, they vary quite alot.
Greg
Yes, the Witness offers more support.
I might be looking at a KKM barrel for my G20. My stock barrel seems well supported....so far no issues with Underwood. After I try the Buffalo Bore 180's I will have a better idea.
Quote from: Geeman on April 13 2014 10:27:42 AM MDT
Quote from: 4949shooter on April 13 2014 09:43:54 AM MDT
I would suggest sticking to the Delta Elite load, or the 165 tmj which so far we haven't had any complaints on (as far as I am aware).
Or just shoot them through the Witness.
Glock with the 155XTP (7 of 17 retreived cases smiled)
(http://www.spanielsport.com/photos/i-vFmRMgg/0/XL/i-vFmRMgg-XL.jpg)
I fired rounds from the same box of ammo through the Tanfo and there was no need of a picture. There were no smiles in 12 retreived cases. There were no real signes of pressure at all. It just handles the pressure better.
Greg
Greg, did you pull the barrel out and slide some of those back in the chamber, to see if they had started to back out, when the "smile" occurred? In other words, with the "smile" aligned does it show the brass flush up to the barrel hood or is it above the hood showing it moved backwards and possibly early unlock condition? :-\ Just more ways of studying the condition found.
Wade
Slap some of those patented wheel weights on the slide ;D
Quote from: The_Shadow on April 13 2014 07:53:24 PM MDT
Greg, did you pull the barrel out and slide some of those back in the chamber, to see if they had started to back out, when the "smile" occurred? In other words, with the "smile" aligned does it show the brass flush up to the barrel hood or is it above the hood showing it moved backwards and possibly early unlock condition? :-\ Just more ways of studying the condition found.
Wade
There is resistance once the empty case is about half way into the chamber. The badly smiled cases won't seat all the way in, I'd guess .010" from all the way in. I cannot say if its because the barrel/slide began separating or if the brass simply was forced out beyond its elastic limits.
Greg
Quote from: Intercooler on April 13 2014 08:21:54 PM MDT
Slap some of those patented wheel weights on the slide ;D
I prefer "slide weight"
(http://www.spanielsport.com/photos/i-KFSHB8C/0/L/i-KFSHB8C-L.jpg)
Can you believe I didn't sell a single set. I suppose its time for a super sale. Maybe next week I'll have a going out of business sale :'(.
There is a problem with the Witness. There just isn't an area flat enough for installation :(.