killswith300wsm wrote:Sorry about that.
Data was taken from Lyman 5th Edition Shotshell Reloading Book (page 124).
Federal Plastic Case 3"
1 3/8 oz
Primer: Federal 209A
Wad: Federal 12SO
Velocity: 1346 fps
Constructive criticism for what it's worth...
Your new to reloading and you chose the wrong component's for the load you wanted, happens to everyone
I'm assuming those are plastic basewad hulls and not the paper basewad, the difference is a lot especially when your using fine powders like Longshot..you will fall short crimp wise as you have seen.
For most 3" 1 3/8 oz loads you need a bulky powder, best choices are Blue Dot or IMR SR 4756, they take up a lot of room in the hull to start with. Your using the Federal 12SO wad which is basically a target wad to make up for the room left in the hull, with a bulkier powder you might be able to use the 12S3 or 12S4 wad which are better for hunting purposes than target wads.
Finally as was stated your pressures are way to low in the chosen load, if you go to use that one in cold weather you might have more problems than it's worth, although Longshot works fairly well in cold weather.
There are several better choices out there for a 1 3/8 oz 3" load
Here's an example of an older load Lyman had in their manual for years, it's good to sub zero temperatures and will do in pheasants very well. I've used this one for around 20 years now.
Federal 3" Paper Basewad hull
41 grains IMR 4756
Remington R12H wad
1 3/8 oz lead shot
1405 fps @ 9350 LUP
If you have the paper basewad hulls or can get them this load won't let you down...NO SPACERS REQUIRED...