10mm 200gr 1.260" COL too long

[astocks2622]

Hello
I got some Beartooth 200gr WFNGC bullets to build a woods load for my 10mm RIA 1911...
the data I'm using (working toward) is from Mike McNett, at Double Tap. He posted loads over on another forum, with a 1.260" COL, & 11gr Blue Dot for around 1250 fps... like I said, woods load.
anyway, loaded 5 with a starting load of 9.5 gr, & went to test-feed them thru the gun.
the front corner of the bullet catches on the side of the magazine, preventing you from loading more than 2 rounds.
I loaded some dummy rounds at 1.25 & 1.24 COL to test. the magazine seems to operate normally at 1.24"... I know I don't want to push too deep into the case B/C of pressure spikes. is .020" too much?
obviously I'd still start low & build up in .2gr increments looking for pressure signs.
is there a reason that approach isn't safe?

 

[rcmodel]

No.

The magazine should be the least of your worries.

What matters is too much bullet sticking out of the case and jamming into the rifling leade.

Take the barrel out of your gun and use it as a gage to determine the longest OAL that will fully chamber, and drop out of it's own weight. (Plunk Test)

Then start at the bottom starting load and work your way up, watching for flattened primers, excessive case bulge, and into low earth-orbit case ejection.
When you see any of that?
Back off.

rc

 

[ReloaderFred]

The wide flat nose is going to require a slightly shorter seating depth, due to the design of the bullet. It also has a shorter ogive, so it may contact the rifling with a longer length.

Just seat to the depth you need to function in your pistol and then work up your load as you would normally. Double Tap pushes the ragged edge with their high end loads, so approach them carefully.

Hope this helps.

Fred

 

[astocks2622]

thanks, that's why I asked! I know that DT is right on the edge, & don't really hope to duplicate their results, just get a solid woods load using their data as a basis.

 

[SDGlock23]

If you seat deeper just cut back a little on powder, at first anyways. When I loaded for the 10mm I could set them out to 1.285" in the KKM G20 barrel, but the barrel on your RIA 10mm may have a short throat which would cause you to have to shorten the OAL.

 

[ATLDave]

Lots of good advice already. I have had to change seating depth because of bullet profile in more than one of my autos.

 

[41 Mag]

If you have any AA-9 you might try some with it as well. I found it shot much better groups and was giving very good velocity a well.

I don't shoot the 200's much, I stuck with the 180r Gold Dot due to getting a bit more velocity and better accuracy than I got with the 200's.

That said, and now that I am casting, I might revisit the 200gr loads once I get around to picking up a mold for it. The 10 is the only handgun other than my .380 that I don't cast for. (YET)

 

[gamestalker]

Whether your loading for a handgun or a high powered rifle, seating depth is determined by firearm fit and function. It's once that I've determined what oal fits and functions (manually cycled), that I then begin my charge work up, always and only, after the oal has been established. If you approach reloading in this manner, you will never find yourself in troubled waters, in other words, suddenly experiencing excessive pressures.

GS

 

[astocks2622]

thanks much for the heads up. I knew oal needed to be watched, but I had completely forgotten about the plunk test for some reason... word to the wiser. Don't reload when you're tired, especially don't try to work up a new one when you're tired!
anyway, ended up having to seat all the way in to 1.220" OAL to pass the plunk test. I don't have any AA#9, but it's on the list of powders to watch for.

 

[gamestalker]

Ah, another who like to load full tilt like me. And #9 is a great powder for the job, so is Longshot. It's far more difficult to get into trouble with these slow burners, even though they do produce top end loads.

GS