quote:

Originally posted by billt:

quote:

Originally posted by WESR:
Again, please do not advise to some posters that it in necessarily safe to seat your bullets deeper!

Why?, because you suggest it is unsafe? That's nonsense. There are bullets manufactured that have multiple crimping grooves at different positions along the bearing surface to accomodate the same bullet seated to different levels, so said cartridge can be functionable in different actions. Remington's .45 cal. 405 Gr. Soft Point is one. It can be seated to several different levels with the same exact powder charge. Deeper, to operate in lever actions, which requires a shorter O.A.L., or longer for single shots. The same with many of the 500 Gr. .458 bullets for the .458 Win. Mag. and .460 Weatherby cartridge. Nowhere in any loading manual does it say, or even suggest, higher pressures will be encountered with deeper seating. With personal liability being a greater concern today than ever before, if such a danger existed I'm sure it would be noted. It is not. Stop pressing alarm bells. There is no fire. Bill T.

Why? Because you are completely wrong. Taking less than 2 min (thanks Ol Joe)I was able to obtain the following online:

"Caution: When loading handgun cartridges it is vital to maintain
the minimum cartridge overall length (C.O.L.) listed in the
tables. Shorter overall lengths may double chamber pressures.
Longer lengths are permissible so long as the functioning of
the handgun will not be impaired."

From VihtaVuori Reloading Guide for Centerfire Cartridges Edition 6 updated July 2008. Page 8.

Of course, I'm sure this is just their opinion. I'm sure they don't know anything about internal ballistics pressure testing. Of course, I don't need this citation at all as I have seen the velocity variations induced by variable seating depth. (The sound you are hearing is me beating my head against the wall)

By the way, this free online loading manual has the most useful burnrate chart I've seen. Lets stop spreading BS.

Wes

Shall I continue? From "Alliant Powder Handloader's Guide" page 10

"Pistol and Revolver Cartridges Special Reloading Precautions
Most pistols and revolvers function best when loaded with a quick-burning powder such as Bullseye. Since peak
pressure is reached very quickly, the seating depth of the bullet is very important: the deeper the bullet, the higher
the pressure. If the bullet is seated too deeply, dangerous pressures will be generated, which could burst the gun
and cause severe personal injury (including death)."

This is coming from Alliant Tech Systems which is one of the countries leading defense contractors. They most likely know a thing or two about ballistic testing.

Wes

Those multiple crimping grooves may be for use in different cartridges. At some time, bullets were being made for use in the 357 mag with 38 spl cases, just by using the inner crimp groove.

quote:

Originally posted by vapodog:
So....let me see here.....does this mean that one can gauge pressure by using a chronoghaph????????????

You and Bill in cahoots?

Just for Bill:

Seating a Wadcutter Flush with the Case Mouth in a 38Spl case using a normal Powder Load - in comparison to a - Seating a similar Wadcutter out 3/8" with the same Load will produce more Pressure in the Cartridge with the Bullet Seated Flush.

Hey Bill, Run that Bold paragraph through your Printer and you have all the Documentation you or anyone else will need concerning the issue. Though WESR did locate similar info which can be printed out too.

Since you are apparently incapable of understanding the Internal Ballistics associated with the issue nor capable of running either very simple Test previously mentioned, you are at a severe disadvantage when it comes to Safe Reloading.

Best of luck to you.

Boy!! Sorry that I opened a can of worms!
Here's what I'm going to do, When the weather gets better (March or April), I will get my old 38 out and load some less then minimum loads and seat the bullet fully down on the powder. I'm thinking 1 1/2 to 2 grains of Unique to start with a 148 gr lead bollit. I'll first try a recomended minimum load with COL then seat the bollit deeper,checking for pressure signs accuracy and velocity. I'll then post the data and results. I Would do it sooner but I can no longer take long periods of the cold, wish I had an inside range.
Mike

Hey Mike, The Board is for "discussion".

Look forward to seeing your results in the Spring. I'm not a fan of weather below 50deg either.

Best of luck with your Testing.