My New 50 Cal Wildcat

[Blitzfike]

Another thought on crimping this beast. I had a variety of loads and crimps worked up, and on some, the brass was slightly longer and jacked pressures up when fired as the case mouth was extending beyond the chamber. Had a few that the crimp was so severe that the case wouldn't headspace correctly and wouldn't fire. There is a sweet spot where you have enough crimp for bullet retention and too much where the case enters the throat. I need to do a little more work on this before I'm ready to say I have a solution. Jim

[sixonetonoffun]

I have been trimming a little short. The crimp definetly caused the case to stretch. It will go right into the rifling. Seems to take care of the issue. Headspaced at 2.65 trim to 2.63-2.64

The idea of letting the brass grow til it stops just won't work when crimping.

Edit: this is no doubt why 50 B&M are built with controlled feed. Doesn't matter how short they are. They shoot short action cartridges in long actions to prove the concept.

[sixonetonoffun]

Here are some more 350gr XTP RL7 #'s
Note headspaced 2.65 trimmed 2.62-2.63
I wanted to keep myself in one piece!

RL7 81gr
Avg. 2259 es 82 sd35

RL7 82gr
Avg. 2351 es 52 sd?

RL7 83gr
Avg. 2367 es 19 sd 9

Accuracy High Node
RL 7 84 gr
Avg. 2379 es 10 sd 4

Do Not Go Any Higher Then 84gr !!!!

Here is first full case of RL7 results!
RL7 85gr
2209
2922
2442
See a pattern? Me either absolutely squirrels here! The first shot was the tip off no way should that number exist with this charge. The 2922 is real there was no chrono error! It literally lifted my heavily weighted lead sled and me 3"s off the table!

RL7 86gr this is a compressed but not crunched load and I only lit one off for the record. It yielded 2481fps and as I said before 84gr was my high max safe load.

All cases extracted and ejected smoothly.

Temp was high 60's to low 70's.

Elevation just below 1000'

Like Dean says thanks for playing!

[scope eye]

You done good Grasshopper,LOL how is the fireball with 80gr plus you must be able to see it from space.

Dean

PS: I see you like quoting me,

[sixonetonoffun]

Honestly can't comment on the fireball I was generally kicked to a 30° angle thus my view was blue sky and the occasional random stars.

I can't wait to shoot again. Going to work up the 500 xtp's next. Hope to put aside a few bucks for some higher bc projectiles. The Cutting Edge ones might be just the ticket to get out to 300 yards. These 350gr xtp's .145 bc is pretty pathetic after 150.

[sixonetonoffun]

So now I have a question for the experts. Could the compressed load of 86gr rl7 be stable? Have seen IMR4064 reportedly behave when slightly compressed in big bore 458's ect.. that 2480 fps would still go transonic by 300 yards and likely tumbling like stone. Probably not worth chasing 100 fps.

[sixonetonoffun]

I'll try the compressed load next week. The general consensus from the interwebs is rl7 works best compressed in big bores. (I used filler during work up). If it works like I believe it will... that should be good for 2480fps . Might even bump 2500?

[scope eye]

I use compressed loads in mine all the time, sometimes I even use a hydraulic ram to force more in the case.

Dean

[sixonetonoffun]

Does anyone make a plastic tip that would fit this? The 45's for muzzle loaders have em. I think that would get the bc closer to .200 and stabalize them much farther. Hmn, may have to consult the interwebs again. I kmow Cutting Edge sells their tips seperate. Don't know if they would fit an xtp though. Yet another use for super glue?

[SUTTERERMAN85]

Hornady makes an flex tip 300 gr

[sixonetonoffun]

400gr Sierra JSP recovered from a oak chunk weight 388gr. Not bad by any means!

[scope eye]

Here is a 300gr Hornady flex tip

[IMG][/IMG]

Dean

[sixonetonoffun]

The numbers look really cool for the price. I just went with the 350's because they are always on the shelf here. The 300 looks like the ideal candidate for mag feeding if nothing else.

[scope eye]

You could not tell by looking at it, but there is 120gr of powder in that round.

Dean

[sixonetonoffun]

Compressed load 87gr had one stinker pulled the avg down. It's primer wasn't seated deep enough and pierced slightly not even enough for a puff of smoke.

I did run into the short trim issue mentioned above. Self inflicted rushing to beat the weather 2.61 is too short in my current setup. Good info to have am getting things narrowed down. ES 31 for the string.

[SUTTERERMAN85]

Dean,
What powder are you getting 120gr to fit in there? Speed?

[scope eye]

Dean,
What powder are you getting 120gr to fit in there? Speed?

That is just me being full of it, I said that I was compressing loads with a hydraulic ram, Post #183, I guess no one picked up on it.LOL
Look at sixonetonoffun signature line, that's it baby.

Dean

[SUTTERERMAN85]

Jerk. You got me all excited!!! I thought you were serious.

[scope eye]

Here this will make you feel better,LOL


I especially like they afterburner effect.


Dean

[sixonetonoffun]

The issue with erratic fps I posted back a ways... Was a full case non compressed load. The bullets just sitting on the powder crimped. Bad idea as you can see. Doesn't build enough pressure for proper ignition and results in all kinds of trouble. Creating in both high and low pressure scenarios.

All my loads used filler to create a compressed load. Except that one. Don't know wtf I was thinking.

The 87gr compressed loads I had zero issues with pressure. RL7 is the perfect case full for me with bullets under 400grs.

The best for hunting will likely be H4198 or IMR4198 for less temp sensitivity.

I think tac will work best (of what I have on hand) with the 400+ grain bullets but haven't gotten that far.

I would really like to find a Rem 798 300wm to build one of these on the cheap and have the advantage of controlled feed. Thus eliminating short cases being an issue. I can see where it would be a huge benefit when switching bullets especially.

[pdcullen]

I would really like to find a Rem 798 300wm to build one of these on the cheap and have the advantage of controlled feed.

Funny you should say that, Davidson's has that model for $297 new right now: http://www5.galleryofguns.com/genie/...spx?item=85864

[sixonetonoffun]

Smoking deal but thats a 783 push feed. The 798 was a Mauser action Remington imported from Fabrique I believe and put a nicer walnut stock on.

[pdcullen]

Doh! I am usually good with numbers.

[sixonetonoffun]

500/375 is a cool handle. HPDT is too. But 50-90 HPDT OR 501-90 HPDT Would be a more accurate description. Glad no one suggested mm 12.7x67.31 wouldn't sound as impressive.

Still 500/375 HPDT was a good and unique moniker.

[scope eye]

It's pet name is the 50 Thumper.

Dean