spraynpray

Anyone tried it? With 9mm mags of course, it would be a neat dual caliber rig. There are lots of 40 to 9 conversion barrels for other platforms, so the breech face shouldn't be an issue.

21.4 specifically says checkering is allowed in production as does appendix E4

That is an interesting idea. There is enough material in the mold block that water passages could be drilled into each half (think engine block), tapped for small fittings and connected with silicone hoses and a recirculating pump...

I am casting a 200gr 40 cal bullet and I haven't yet measured the output. At the rate in the video, we are looking at 800/hr, but when it starts taking a while for the lead to freeze, that slows down quite a bit. Once the blower is mounted, I'll measure the time and see how many I can realistically make with stocking the pot, etc in an hour.

jmorris nailed it, v-blocks to open the mould and a spring to close it. jmorris - nice work, do you run a blower on your machine?

I whipped up a casting machine over the weekend to make it easier and faster to cast bullets. I already had a Lee bottom-pour pot and an RCBS mould, so I built the machine around those two components. I watched several videos of the Magma Engineering Master Caster and felt that the design was simple enough to duplicate. I bought the shaft, shaft collars, mounted bearings and some steel and had the rest lying around. Short video of the machine in action: Finished bullets drop into a 50-cal ammo can and the sprues are dropped into a 30-cal can. Overall, I am happy with the results but I need to add a squirrel cage blower to speed up the cooling process and increase the output. The 20lb pot is probably going to end up being too small and I predict (with the blower), I will be able to outrun the smelting capability of the pot. The real Magma has a larger pot, pours both cavities at once, and is a one-handed operation, but my version cost me a lot less and I can use off-the-shelf RCBS moulds.

midway has some at the moment

Looking for a sling mount? Otherwise, why do you "need" a clamp? Lots of us run extensions without clamps and have no issues.

+1 on the fiocchi aero slugs. the low recoil are nicer to shoot but the full powers work as well.

I looked up the part number and that is the same barrel that I have (middle in the photos). Truglo sights, extended XF ported choke. You should be able to remove the pin in a few minutes with a file. I need to get my hands on a Browning Gold or Maxus and see how those barrels compare, they may be additional options for those of us with FN shotguns.

The SX2 barrel is not back-bored and it uses standard invector chokes. The outside of the barrel is also larger in diameter: the SX3 forend has to be forced over the barrel. The smaller bore diameter and the heavier wall make this barrel shoot lights out with fiocchi slugs. The SX3 barrels are both back-bored from the factory (.742) and use invector-plus chokes.

3.5" receiver in this photo. The combination of the longer ejection port and the ejector being farther back allows it to eject 3.5" empty hulls.

The 3.5" barrel fits and works on the 3" shotgun, but it still will not work with 3.5" shells due to the difference in the ejection ports. 3" SX3 ejection port shown

Here you can see the differences in the receivers, one being cut for the locator pin, the other isn't. 3" SX3 on the left, cut for locating pin 3.5" SX3 on the right, not cut for the locating pin.

Here is another view. 22" 3" chamber SX2 Practical on top (I cut the cantilever mount down into a sight ramp and serrated it) 24" 3" chamber SX3 "turkey" barrel middle 28" 3.5" chamber SX3 barrel bottom The barrel extensions on all 3 have the same dimensions. Both SX3 barrels have two locations for the ejector pin. The 3" chamber uses the forward position and the 3.5" chamber uses the rearward. The SX2 barrel (identical to the SLP) has only the forward position.

The SX2 practical barrel I have does have the locator pin. One of my SX3 barrels also has the locator pin, but the other doesn't. 22" 3" chamber SX2 Practical on top (I cut the cantilever mount down into a sight ramp and serrated it) 24" 3" chamber SX3 "turkey" barrel middle 28" 3.5" chamber SX3 barrel bottom Both 3" barrels are interchangeable, there has been some debate as to the compatibility of the SLP/SX2/SX3 barrels, but both of them work fine on my 3" SX3 I use for 3-gun.

True Blue under a 207gr LSWC works just fine in my TS. I'll have to measure the OAL later tonight, I can't remember.

I haven't had a problem with the rifles coming off of the magazines but then again, when was the last time you had a mag drop without pushing the button first?

My version started as a Jeep jogging stroller. I removed the fabric, added some expanded metal and a cargo net. A set of cheap gun holders on the right side hold the shotgun and some busted magazine bodies welded to the left side hold either an AR-15 or an LR-308.

I was squadded with someone using one at Ozark 2011. He genuinely did use it to change constriction depending on the stage. They used to be popular decades ago, but nearly every shotgun is threaded for interchangeable chokes these days, so poly-chokes are declining in popularity. Carlsons will install chokes in your barrel for $125 and it includes three chokes: http://www.choketube.com/choke-tube-installation.php

I run the factory CZ rubber grips:link on my TacSport. A good pair of scissors is enough to trim the bottom of the grips to clear the magwell.

sent PM

Big Bore posted: "In my opinion if you have a BDC you need to step into scope tactical." I was merely showing that a BDC-type irons setup exists, with an adjustable second aiming point too. Is it faster/more accurate than a prismatic? I don't know. I don't think it should be classified into scope tactical, though. Eotech has BDC reticles in 1x optics: Equipment advantages and races will always exist as long as people think outside the box but within the rules.

Not exactly a BDC, but the same principle of multiple aiming points without dialing: KNS tactical crosshair (I would post a link, but I don't have enough posts).

If you are planning to do any competitive shooting that requires mil-ranging, FFP is the only way to go. Once the buzzer goes off, I have seen folks trying to range targets only to realize later that all their measurements were wrong because they were on the wrong scope power. Could this be avoided with more practice and mental conditioning? Sure. At the end of the day, however, it is one less thing to worry about. I have a Bushnell spotting scope with a FFP mil-dot reticle. I use it in tactical competitions with a pistol-grip head tripod for ranging and it works great. Also, when spotting shots, it is easy to give accurate corrections in mils. The spotter is also nice for practicing ranging in an urban area, because you don't have to point a rifle around, you just look like a birdwatcher (or a creep, depending on the size of your mustache). I will go to a city park with an overlook and make a practice range card by ranging trash cans, fences, park benches, picnic tables, etc, then check my work on google earth.