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Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 16th, 2017, 6:50 pm
by el diablo
Sent a couple of Hal’s new 2 3/4” loads downrange. Shot thru Sa20 and Carlson’s .565
Not too shabby!
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Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 16th, 2017, 8:37 pm
by BumbleFoot
Not shabby at all. 9’s I take it???
Both shots with same set up? If so, what do you attribute the big diff in the 10/20 ratio to???
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 16th, 2017, 10:07 pm
by el diablo
Same gun and choke. I think each shell was slightly different. Have to wait for Hal to chime in. If ya look at overall 20" numbers they are very close.
Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 16th, 2017, 10:26 pm
by hawglips
Not a significant difference in the 20”. I pay more attention to the 20” numbers than the 10” when looking for consistency. There was a small alteration between the two that so far hasn’t seemed to make much difference.
357 count 9s for these.
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 17th, 2017, 6:25 am
by 2Shooter
That's zippy fast!!!
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 17th, 2017, 3:20 pm
by paboxcall
I'm not a TSS guy, but I watch these posts because I appreciate the dedication in time, research and testing to achieve these results. Wow - Well done! That is an awesome load.
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: November 19th, 2017, 8:59 pm
by BeardBuster
That’s awesome. Looking forward to learning how you get 2 1/8 oz in a 20 ga load. Thanks for sharing.
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Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: December 15th, 2017, 8:43 pm
by BumbleFoot
Alright...so 1260 fps > 1100-ish fps
Can someone who paid attention in physics class tell me “what do it mean” in practical terms? A little more energy, less drop, greater lethal range, more thump fore and aft...
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: December 16th, 2017, 8:36 am
by Spuriosity
BumbleFoot wrote: ↑December 15th, 2017, 8:43 pm
Alright...so 1260 fps > 1100-ish fps
Can someone who paid attention in physics class tell me “what do it mean” in practical terms? A little more energy, less drop, greater lethal range, more thump fore and aft...
Yes, all of those things. The "zippier" load has the same penetration at 81 yds that the slower load has at 74, but that is gilding the lily IMO. TSS lethality is more dependent upon pattern density than starting velocity IMO. To me, the most significant difference between those two loads is recoil. With all else being equal, increasing speed from 1100 fps to 1260 fps in a 6.5 lb gun would increase recoil from 48 ft-lbs to 62 ft-lbs (assuming a 2 gr increase in powder). But those numbers are approximate because I don't know if they use the same powder, wad column, etc.
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: December 16th, 2017, 10:37 am
by BumbleFoot
Spuriosity wrote: ↑December 16th, 2017, 8:36 am
BumbleFoot wrote: ↑December 15th, 2017, 8:43 pm
Alright...so 1260 fps > 1100-ish fps
Can someone who paid attention in physics class tell me “what do it mean” in practical terms? A little more energy, less drop, greater lethal range, more thump fore and aft...
Yes, all of those things. The "zippier" load has the same penetration at 81 yds that the slower load has at 74, but that is gilding the lily IMO. TSS lethality is more dependent upon pattern density than starting velocity IMO. To me, the most significant difference between those two loads is recoil. With all else being equal, increasing speed from 1100 fps to 1260 fps in a 6.5 lb gun would increase recoil from 48 ft-lbs to 62 ft-lbs (assuming a 2 gr increase in powder). But those numbers are approximate because I don't know if they use the same powder, wad column, etc.
Spur not only knows physics, he knows Shakespearean literature too. Just goes to prove that I’ll be paying for my education from an SEC school for the rest of my life...
Even a theoretical increase of 14 ft-lbs when already flirting with dangerous game level recoils is enough to make me flinch just walking by the gun safe. Lots of variables and assumptions when comparing loads I’m sure. I think we’re dealing with different components, including propellants, and even lower pressures in the speedier load. But, I’ll let Hal weigh in on proprietary info...
Re: Hal’s new Lil Zip 1260fps 1 5/8oz load
Posted: January 2nd, 2018, 3:31 pm
by Reloader
I can tell you that when working up my own 1-5/8oz loads in 20ga that when I got in the 1200-1260fps range, the recoil was obnoxious. I honestly felt like something was going to break on the various light weight guns I was testing, they just aren't designed for that type of punishment in my opinion(I'm not speaking in terms of damage from pressure, but in terms of failure of internal parts such as lugs, bolts, and gas system parts). I ended up settling on 1175fps for hunting and it's more than enough to get the job done at ridiculous range.