Lil Gun, it's a weird powder
Posted: Mon May 20, 2019 9:37 pm
I finally got around to bedding my Sportco Hornet and floating the barrel recently, and decided to try working up a load with some 30gr Calhoon HPs which I was given by Stinkitup. I've played around a bit with Lil Gun powder in this rifle with some mixed results, some of which I can probably attribute to the unbedded and unfloated action and barrel previously, but also getting some stuck cases which had to be knocked out with a cleaning rod. I had been lead to believe, mostly through forum research on some US forums, that you couldn't get enough Lil Gun into a Hornet case to get into trouble pressure wise, however I had the stuck cases and slightly flattening primers to disprove that notion.
Anyhow, on to this past weekends results...
Starting with 12.2gr and working up to 12.8gr in .2gr increments I loaded three of each weight with the 30gr Calhoon seated to an OAL of 1.72" and tried them out at home at 50m on my short range that I built. Scope is a 6x Zeiss Diatal with #1 reticle, hence the target dot with the white section to give me a bit more precise aiming mark.
Now here is where it gets a bit odd, at least to me... The lighter loads gave me a lot of vertical stringing and some pretty extreme velocity spreads, in the order of 150fps or so. I had two cases of the 12.6gr load stick in the chamber and require knocking out, all of which didn't inspire a lot of confidence for the 12.8gr loads. I decided to fire them off as they were crimped with a Lee crimp die, and if I had to knock out 3 more cases and go away to scratch my head and ponder what to do next, so be it.
Anyhow, cue surprised look on my face as the three 12.8gr loads went into a group about 3/8" along with the velocity spread settling right down to an E.S. of 33fps and SD of 17fps. This group averaged 3154fps also, which I'm pretty impressed with. I wasn't 100% convinced, so I wandered back to the shed and reloaded the three cases that I had just fired and shot them at the same target. The resultant 6 shot group measures bang on 1/2" and the second three shots averaged 3135fps. Best of all, no pressure signs or pressure spikes and no stuck cases. I'm guessing the higher load density did the trick with setting down the powder burn rate and smoothing things out.
The Calhoon projectiles are made in Montana, and I gather from Ryan that he got them from Johno originally, so I'm thinking I'll have to see if they will post them across the border to where I used to live in Saskatchewan, and if so I'll pick them up in 5 weeks and bring them back with me after a trip back to the farm. I'm keen to test these on some bunnies and foxes, but since they were made specifically for nailing prairie dogs I'd be willing to bet that they'll do the business.
Cheers
Joel
Anyhow, on to this past weekends results...
Starting with 12.2gr and working up to 12.8gr in .2gr increments I loaded three of each weight with the 30gr Calhoon seated to an OAL of 1.72" and tried them out at home at 50m on my short range that I built. Scope is a 6x Zeiss Diatal with #1 reticle, hence the target dot with the white section to give me a bit more precise aiming mark.
Now here is where it gets a bit odd, at least to me... The lighter loads gave me a lot of vertical stringing and some pretty extreme velocity spreads, in the order of 150fps or so. I had two cases of the 12.6gr load stick in the chamber and require knocking out, all of which didn't inspire a lot of confidence for the 12.8gr loads. I decided to fire them off as they were crimped with a Lee crimp die, and if I had to knock out 3 more cases and go away to scratch my head and ponder what to do next, so be it.
Anyhow, cue surprised look on my face as the three 12.8gr loads went into a group about 3/8" along with the velocity spread settling right down to an E.S. of 33fps and SD of 17fps. This group averaged 3154fps also, which I'm pretty impressed with. I wasn't 100% convinced, so I wandered back to the shed and reloaded the three cases that I had just fired and shot them at the same target. The resultant 6 shot group measures bang on 1/2" and the second three shots averaged 3135fps. Best of all, no pressure signs or pressure spikes and no stuck cases. I'm guessing the higher load density did the trick with setting down the powder burn rate and smoothing things out.
The Calhoon projectiles are made in Montana, and I gather from Ryan that he got them from Johno originally, so I'm thinking I'll have to see if they will post them across the border to where I used to live in Saskatchewan, and if so I'll pick them up in 5 weeks and bring them back with me after a trip back to the farm. I'm keen to test these on some bunnies and foxes, but since they were made specifically for nailing prairie dogs I'd be willing to bet that they'll do the business.
Cheers
Joel