bronko22000

I've been playing with shooting big 405 gr conicals out of my GM 1:30 twist barrel. I've been trying paper patched bullets and bare conicals. After several outings I've determined that the paper patched bullets do not shoot as well as the bare lubed ones. In fact group size using the bare bullets are about half the size of the PP bullets.
The target below is the best PP group shot followed by the bare bullets' group. Other covered holes are from other PP tries.

1874sharpsshooter

That's interesting cause my experience has been the opposite . I usually have better accuracy with PP but every gun is different I guess

hunters_life

1874sharpshooter, Do the rifles you have experienced good grouping with paper patched bullets have deep groove rifling? I found a while back that the deeper grooved rifling in a couple of my rifles seemed to react well with paper patching while the shallower rifling faired much better with bare lubed. My renegade absolutely loves bare lubed bullets but I tried paper patching with it and it looked like a drunk chimpanzee was shooting the target. But 2 of my Lyman rifles are the exact opposite.

bronko22000

Must be the case I guess. I tried shooting the PP bullets without an under wad, with a felt wad and with a veggie wad. Changed powder charges and powders. Nothing seemed to improve the accuracy.
And the group pictured above of the bare lubed conicals wasn't even the best group fired with them. That was just from this morning. The rifle shot a 3 shot cloverleaf group twice before. That group in the lower left corner of the target (covered with masking tape) is one of the 3 shot groups @ 50 yards with the bare conicals.
I was hoping the PP bullets would shoot good and I appreciate the advice and patch material supplied by both you and Ron to help me try them.
I wish I could have found a couple of the paper patches. But shooting in the high grass made it difficult.

Semisane

Bronko, were all of those at 50 yards?

bronko22000

yes Semi... The upper 3 shot group covered in orange dots were the other day with open sights
The ones today were with a peep sight installed. There was no significant difference in group size between the open sights and the peep.
Edit: bore was swabbed with 2 wet and one dry patch between shots. I made a sight adjustment and will shoot the conicals at 100 yards next time out.
If they don't shoot well at 100 I have no problems going back to saboted 200 gr 10mm XTPs. They worked well on deer in the past and were accurate.

Muley Hunter

Speaking of conicals. Does anybody know the BC of a .50 460gr NoExcuses?

sabotloader

Computed by Big6x6 a long time ago might give you a good ideal..


Today I picked four representative conicals to calculate the BC. The BC is the average of three shots fired thru two ProChrono chronographs simultaneously that were 100yds apart for each bullet. All calculations were done with Load from a Disk Version 4.0. The charge was always 80gr fffg Triple Se7en used in each of two White Rifles 97s.

.451s
Bullshop 420gr- 0.268
No Excuses 495gr- 0.326

.504s
Bobs NEW 496gr- 0.241
No Excuses 460gr- 0.202

These BCs are dedicated to Underclocked!

sabotloader

This might give good ideal... Computed by Big^x6 many years ago!


Today I picked four represenative conicals to calculate the BC. The BC is the average of three shots fired thru two ProChrono chronographs simultaneously that were 100yds apart for each bullet. All calculations were done with Load from a Disk Version 4.0. The charge was always 80gr fffg Triple Se7en used in each of two White Rifles 97s.

.451s
Bullshop 420gr- 0.268
No Excuses 495gr- 0.326

.504s
Bobs NEW 496gr- 0.241
No Excuses 460gr- 0.202

These BCs are dedicated to Underclocked!

Muley Hunter

Did he also record the velocity, Mike?

The 80gr 460gr NoExcuses is my interest. That's the load I was using.