Rto

[hatsanmad]

Hi guys. Just curious. How many people use a rto crimp finish instead of a standard 6 point crimp? And how do you apply the roll crimp i.e pillar drill or hand drill?

Thanks hatsan

[TONY R]

Dont use a RTO instead of, but use one as well as a normal crimp closere.

I use both types of crimp closure depends on what i am doing.

One thing i never do is RTO over a crimp closed case. This can bump the pressures up from what i have seen with the pressure test gun, if cases are not crimping tidy without RTO ing over the top, there is a problem some where either the case is too old and weakened or the crimper mech is set up wrong some where.

[Guest cookoff013]

i crimp.

[UK fowler]

I use both also some loads in the shorter cases ie 12gauge 23/4" and 3" can be a tight fit with some of the bulky euro powders when loading steel shot and some times you can push the payload to its max and still get good speeds and low pressure the 3" loads that push 37.5grams of steel shot are a popular load that are hard to match with a star crimp finish. Charlton used this stile of load a lot on his early data disks

[eric lee]

Just be aware many 3in rto loads will not cycle in many 76mm chambered autos 2nd round will not feed due to excess length of the finished round, some case trimming may be required! hand or pillar drill either do nicely.

[UK fowler]

yes they are best used in a 31/2" auto this is a hot 37gram load posted up by dan the dane I use this at 40grains of powder and the overall length is to long for some 3" autos/pumps

Client:..................Dan Sørensen
caliber:.................12-3
cartridge lenght:.......
case type: .............cheddite, plast,new
primer..................cx2000
shot weight............1-5/16oz (578.7 grains) steel
shot size................#3
wad:.....................LBC-48/50
crimping............... RTO
test powder:..........43,0 grains alliant, lot 12
test gun: ..............remington 870,12-3½,modified choke.
Velocities distance:6.5 ft.

1625 FPS 12299 PSI
load at your own risk

[Continental Shooter]

that's a nice load load...

 

be interesting to know the height of the crimp and the hull...