G.day from Down Under
 

Been lurking for a couple of years. Am an old HP Silhouette Rifle shooter with no bones left, & have been chasing the "holy grail" of recoiless rounds capable of toppling the Rams @ 500 metres. Have accumulated much data & think I'm getting close. Will keep in touch. kind regards, leadlauncher. Australia.

Greetings
 

Hey there Leadlauncher.......Rams at 500m with a recoiless rifle sounds like a whole lot of fun. I'm no silohette shooter...just enjoy experimenting with my 300/221 contender carbine launching 240gr matchkings at subsonic speeds. It's kinda cool to have a Phhtttt, a small nudge on the shoulder then a 30 cal hole appear 200m down range on target. I'm just waiting to get my scope back from Premier reticles - its having multiple hold dots installed for 50m increments. I'm hoping that between my scope & range finder these very weary feral goats out my way better start heading for the hills now.
Welcome to the forum....I look forward to hearing about your experiences.

Are you not a bit optimistic to knock a ram out at 500m? Touching it would already be great.
I have no previous experience, but the banana trajectory is not easy to play with I imagine.
Would not you be better with a 338 whisper or BR?

ND

Ram Knock Down
 

G'day D-Mon,
It's all mainly about the bullets. I have also been playing with a .338 BR REM(read .338 Whisper) for about 18 months. Launching a 250 grain Lapua Scenar (BC .662) out of a Lapua 6MM br case , behind 21 grains of ADI2207 (aussie powder) realises 1492 ft/sec at the muzzle. This translates at 500 metres to a terminal momentum of 1.25 pound/inches. (Not bad considering that a 7mm08 with 162 Amax at MV of 2555 ft/sec is 1.35 pound/inches)
The figure bandied about for minimum ram knock down by the IHMSA gurus is approx .88 pound/inches. If you have some decent ballistic software like NF or RCBS LOAD, you can see that the 250 GRN Scenar loses little velocity over this distance. Well, I can tell you I am having lots of fun mucking around with this, and thats gotta be worth something. Have fun!! & regards. Leadlauncher.

:) Have you tried 180 gr bullets in the 338 br? what kind of speed can you achieve? in a standard barrel?

So, can the 300 whisper be efficient on the ram at 500 meters?



ND

.338 BR Remington
 

D-mon,
Actual results as follows. 180 grain Nosler Ballistic Tip with 27.0 grains of ADI2205 is the fastest I have been @ 2252 ft/sec & MOA @ 100 metres. When I test I cut the section out of the target @ paste this into a log. At some stage I will probably scan this into a digital image & post on this site. I will keep you informed re the .300/221 as and when possible. regards. Leadlauncher.

300 Whisper
 

Leadlauncher: About seven years ago I used the 300 Whisper in a TC Contender 14 inch barrel to compete in IHMSA. I had good results at the rams at the 250 meters. Then later on I built me a rifle for rifle competetion, at 500 meters it was not as good as I thought it would be, but with a little work and testing it became a good competeter. If you use the 180gr your sucess is better than average. I have used the 300 whisper to shoot wild boar, mule deer and bear down in California with great sucess. The round is an effective round when its limitations are known. I use it in a custom built AR15 now and still it is one of my favorite weapons to shoot.

I thought it would have gone a bit faster, kind of 2450 fps at least. How long it your barrel?
Thank you.
Nd