David's Forum
Register Latest Topics
 
 
 


Reply
  Author   Comment  
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #1 
Well guys, as promised, here are the tests that I did on my CVA Apex in 357 Maximum...

The scope used in testing is a Nikon 6X-24X-50mm. Magnification used during these tests was between 18X-24X...

Most days were heavy overcast with temperatures averaging 50-60 degrees...

Here is my set-up for most days -






I used a 100 yd/meter surveyers tape to measure out the range so each distance was exact and not guessed at...



Before I forget, all loading was done with a set of Lee Carbide pistol dies and I deburred the flash holes in all my brass. This in fact gave me an average velocity increase of 30 fps. and dropped my standard diviation of all loads tested down to the single didgits - with very few exceptions....



DAVID

__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #2 

GUN PICTURES -

Gun Tested was a CVA Apex that I built the barrel for by "barrel stubbing"...

Barrel is 1.062" in diameter / 24 1/2" long / 26" overall with brake...

I chose a 1-20" twist rate for this barrel because I normally shoot bullets 160 gr. and lighter in the 357 Maximum. Other barrels I build are normally with a 1-14" twist rate for those that like to bullets up to 200 gr. in weight. This twist will also stabilize bullets down to 125 gr. if you were so inclined to go that light...

Muzzle brake is screwed onto the barrel after threading and crowning...

Trigger pull is a very crisp 2 3/4 lbs...

Forend is pillar bedded as well as full length epoxy bedded...






























DAVID


__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #3 
COMPONENTS USED IN TESTING -










































This is Remingtons "bulk bullet" - 158 gr. Jacket Soft Point -



Where there are two rounds shown, one is crimped in the cannelure and the second is seated out to touch the rifling - to create more powder space....

DAVID

__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #4 

Velocity figures:

Maximum velocity 110 gr. bullets was just over 3,000 fps...

Maximum velocity for all 125 gr. bullets tested was 2,700 to 2,800 fps...

With the Hornady 140 gr. FTX bullet, I safely got 2,700 fps.. With 158 gr. to 160 gr. bullets, velocities were just over 2,500 fps...

Exact load data is not listed because all guns are different, and gun used had a 1-20" twist rate barrel. Standard twist rates vary from 1-14" to 1-16" to 1-18", with a few odd ball twist rates in between...

I chose the 1-20" twist rate for maximum velocity potential with the 357 Maximum, using a somewhat longer and heavier than standard barrel. My reasoning? VELOCITY and ACCURACY...


__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #5 

TARGETS -

ALL targets were shot @ 100 yds. and ALL groups are 3-shots...

Groups were measured outside to outside, minus bullet diameter...










































These were just some of the "good groups". There were lot's of groups like the ones below that were a "NO-GO" and were scrapped for a much more promising load...









DAVID


__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #6 

TARGETS -

Groups were shot at 200 and 250 yds. - as marked on each individual target...


















These are some of the better groups shot past 100 yds.. Several 200 yd. groups were 2 1/2" to 3" but to me, that does not qualify for what I expect out of my rifles....

DAVID

__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #7 
EXPANSION TESTS -

These bullets were NOT shot at reduced velocity but were full power loads shot at 100 yds....

The Remington bullet shown first measured exactly 5/8" across!

Bullets shown are frontal view and then side or bottom view...




































I will also mention that there were three bullets fired for each bullet tested and all three were very near mirror image of each other....

DAVID

__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #8 

EXPANSION TEST -

ALL bullets were shot at a measured 250 yds.. Why that distance and not 200 yds.? Simply because that seems to be the maximum distance most everyone is comfortable with...




































DAVID

__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
DAVIDWHITE

Moderator
Registered:
Posts: 3,869
Reply with quote  #9 
Last but not least - my coyote load...

YES, the velocity reading is correct as I checked it over 2 completely different chronographs...






Yes, that is 3-bullet holes! I took an extra picture without the dime so you can see that I'm not covering up a bullet hole...















The purpose of the #1 size steel shot in the hollow point is to prevent the bullet from exploding at and above the 3,000 fps. level as it exits the muzzle and down range....


ADDENDUM:

These last two are Remington's bulk bullets from Midway USA...






Five of each bullets shown were shot into a 150 lb. block of ballistics jelatin that was designed to duplicate both the hide and rib cage of a deer...
Bullets shown were the ones that offered the most expansion for each bullet tested...

180 gr. bullets were fired at 2,200 to 2,300 fps. from a 21" barrel with a 1-14" twist...

200 gr. bullets were fired at 2,100 to 2,200 fps. from a 21" barrel with a 1-14" twist...





























Last but not least is the Hornady 180 gr. XTP. This deer was shot at 60 yds. by my best friend Phil, with an H&R 357 Max that I had built for him. Muzzle velocity was just over 1,800 fps....





Both of these deer were shot with the Hornady 180 gr. XTP. The buck was shot at 120 yds. and the doe was shot at 40 yds.. Entrance wounds were golf ball in size and exit wounds were as big as tennis balls...







__________________
David and Brenda White 

By HIS stripes, we are healed...

God Bless  <")))><

e-mail me at: precisionriflesmith@gmail.com

Shop phone: (918) 576-3217
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.