A car in the shop is always a bummer. Dead cars don't push very well either.

Anyone remember the "Myth Busters" where they shot into water?
The slugs didn't go very far which implies pretty high G forces during deceleration.
Anyone with a swimming pool in the country can test this. In the city neighbors tend
to get upset.
Start with pure lead and work up to reasonable hardness. How you separate slump
from acceleration in the barrel and decel in the water I really don't know but it would
make an interesting experiment. The forces for + accel and - accel are probably close
since the distances are similar. Someone smarter than I need to calculate the force and
see if it exceeds the yield strength of the bullet. At least in the barrel the diameter is constrained; not so in the water. 
Something to do in your spare time.

car got picked up at closing time so I hope to hit the range tomorrow. I lubed 3 grooves on 25 bullets and 6 on the other 25 all hoch 195 gr. 32 caliber, and am planning on doing a little test to see how much if any difference different amounts of lube makes a difference.  only problem is tomorrow wind is supposed to be 10 to 20 mph. I plan on shooting anyway as I need to shoot in all conditions and if I wait for the perfect day   will if I wait for the  perfect day I would wind up watching orpra  on tv instead of shooting. and one more thing the car was in for a recall so I didn't have to spend gun money on it. wife had to use my car to go to work but tomorrow I am a free man to go or stay as I choose  and I choose to go.

Oh, again re bullet catching. I recall some people catch bullets in oiled sawdust
beltfed/arnie

nose slump can be detected in at least 2 ways.
most recovered bullets are damaged in some way and have their shapes modified somewhat. however, the noses are usually still visible, and rifling marks in them indicate that they have bumped up.
not sure how much this happens with smokeless, but with black it is an issue that causes more unnoticed accuracy problems than some realize.
these noses, forced into the rifling, are unlubricated, and as such are a sources of led and friction.
this is minimized when blowtubing because for all but the first shot the barrel is lubricated, but when wiping is a problem.
paper patching will prevent this.
even 16:1 will bump into the rifling.
in the old days, the only long nosed bullets were of pp design.
greasers were more like the pope style bullets, or 44/40, with 
short noses less susceptible to such problems.
another indicator of nose slump is long range sight settings.
going from 20: 1 to 16:1 requires about 2 points less comeup at longer ranges.
suspected reason is that the nose of the harder bullet retains a lower drag shape due to less slumping back.
the old dead guys used alloys like 12:1 for long range bullets to retain higher b.c. by minimizing nose slump.
these were patched to bore, and still bumped up enough to take the rifling well.
keep safe,
bruce.

Bruce, would a half wheel weight and half lead Lyman 457125 be hard enough to prevent nose slumping?

Slug guns made by Horace Warner and others used a swaged two peice paper patch bullet. The bearing section was soft lead while the ogive, ofen near spitzer style, was of a harder lead alloy which reduced nose form deformation.

Thanks Joe me and my shooting Buddy also went out today and the conditions were quite similar. I have been working with a new powder I have not yet seen used but seems to be very promising. Another 20 twenty to thirty 10 shot 200yd. ASSRA score targets should start giving me a taste compared to what I currently use. I was only able to squeak two 249's and a 247 today. One 249 and the 247 were shot with the new powder and the other 249 with my regular powder for the sake of comparison. But to draw any conclusions after only three outings with the new powder at this point in time is just to close to call so the experiment goes on.
Rifle used my FBW Model J 28-35SS Traditional Rifle by design only and please keep me informed on your progress it is extremely interesting to me and I trully hope to learn from it.

JLouis