Author Topic: 300 whisper (Read 1873 times)

rmurf · « **on:** August 28, 2007, 07:59:50 AM »

need some loads for 300 whisper what kind of accuracy can i expect from 10 in barrel

Jim Stacy · « **Reply #1 on:** August 28, 2007, 10:28:05 AM »

Excellent accuracy is the norm. My factory 10" will shoot around .5" at 100 with a 125 Sierra and 18.5 H110. H110 seems to be the powder to use for the best combination of accuracy and velocity and the 125 BT is an excellent bullet for the 300 W. I have used the 110 RNSP for pl inking and small game but it is a little more difficult to get good accuracy from. There are good 300 W. loads in several of the loading manuals. You may also want to try forming your brass from commerical 223's instead of 221's seem to last longer and give better accuracy , with slightly less case capacity.

Lone Star · « **Reply #2 on:** August 28, 2007, 04:09:51 PM »

I had better luck with the Hornady 110 V-Max bullets on small deer. These bullets expand better than the Nosler 125s at 10" .300 Whisper velocities, but they are still best used for lung shots. They are analogous to the 110 RN bullets that made the .30 Herrett's hunting reputation; remember that the Whisper is over 200 fps behind the Herrett. The V-Maxs shot as well as the Nosler BTs did in my barrels - 20 grains of H110 did it for me.

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rmurf · « **Reply #3 on:** August 29, 2007, 07:39:43 AM »

thank you

Steve P · « **Reply #4 on:** August 29, 2007, 09:14:31 AM »

Good loads referenced above. My standing load for IHMSA silhouette is 11.0 grains of 296 and RCBS 165 sil cast bullet. Very mild recoil and drops all the steel target it hits.

Steve

Jim Stacy · « **Reply #5 on:** August 31, 2007, 11:22:36 AM »

Lone Star thanks for the info on the 110 V-max. I have shot some paper with them and yes they do shoot good. I have not shot anything , like deer and wondered how they would work on deer. The 125 wondered is OK at 2000 and will expand at anything above 1700 so long shots are not the norm for a 300 W. JD Jones says they are a 200 yard deer gun and people may have killed deer that far but ? How soon and how far did they have to look. I read one story about a person shooting a deer at 400 yards with a 30 Herrett but I would not try it.
300 W. is a marginal deer round that requires precise shot placement , which it is capable of. LS you mentioned 20/H110/110 V-max have you chronoed that load ? Have you done any work with Little Gun ?

palgeno · « **Reply #6 on:** September 01, 2007, 06:19:25 AM »

You guys using mag primers with H110 in the 300 W? I have been loading CCI small rifle primers for my TC 10 inch barrel and have had slight over pressure signs well at below max loads. Thought about trying Winchester small rifle primers. Comments? Gene

MS Hitman · « **Reply #7 on:** September 01, 2007, 02:30:54 PM »

Load up a 220 or 240 grain bullet to subsonic velocities and it's a real good deer round; nothing marginal about it at all.

Lone Star · « **Reply #8 on:** September 01, 2007, 05:22:14 PM »

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my TC 10 inch barrel and have had slight over pressure signs well at below max loads. Thought about trying Winchester small rifle primers. Comments?

What kind of pressure signs are you seeing?

This could be a good example of why one wants to work up to a max load. Just because a loading manual says a particular load is below max doesn't mean it will be below max in every barrel. Your barrel may have a tight bore, short throat, your brass may be thicker, or your lot of H110 may be hotter than what the manual used. I use F205 primers in my .300 Whisper.

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Load up a 220 or 240 grain bullet to subsonic velocities and it's a real good deer round; nothing marginal about it at all.

Personally I prefer to rely on expansion rather than bullet tumbling to cause a wound channel - but that is really moot since T/C .300 Whisper barrels do not have a tight enough twist to stabilize those long bullets. Only aftermarket barrels will do it - but they do it well. The longest I have been able to get decent sub-sonic accuracy with in my T/C barrel were 200-grain boattails. Sierra simply states that their 240s won't work.

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LS you mentioned 20/H110/110 V-max have you chronoed that load ? Have you done any work with Little Gun ?

No, I haven't chrono'd H110. I have some Lil'Gun but haven't tried it in the little .300. I suspect it may be a bit too fast for best velocities in the small case.

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spinafish · « **Reply #9 on:** September 02, 2007, 12:13:15 PM »

When I asked J.D. about Lil' Gun in the .300 Whisper, all he said was that it wouldn't operate an AR-15...

Ruskin · « **Reply #10 on:** September 03, 2007, 02:40:24 PM »

I've never been impressed with the 300; however, I am giving it another chance. I loaded today.

I loaded 18.5 grs H110 with 125 remington bullet(cheap).

I loaded 19.0 grs H110 with 110 speer RN(leftovers).

These are almost compressed loads, sure came close to base of bullet.

I don't have a COL. The diagram I had left it to the loader. I dropped it into chamber to check on fit. The 125, I went to the cannelure.

I put a Nikon scope on after busting two Leapers. Maybe with the changes, I will have a shooter.

I looked at burn rate for lil gun, it is next to H110. Why wouldn't it work?

spinafish · « **Reply #11 on:** September 04, 2007, 08:15:00 AM »

doesn't generate enough pressure would be my guess. this powder seems to match the speeds of H-110 within the same bullet weights,but generates less pressure.

Lone Star · « **Reply #12 on:** September 05, 2007, 12:56:29 AM »

Actually Lil' Gun will generate more chamber pressure than H110 in some cartridges and loads - I found this out the hard way. Because it is faster than H110, by the time the bullet gets to the gas port in an AR the pressure has dropped too low to function the action. So yes the port pressure is lower than H110, but not necessarilly the maximum chamber pressure.

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Ruskin · « **Reply #13 on:** September 05, 2007, 03:45:46 AM »

LS what you are saying is that lil gun could be used for the whisper only at a reduced load. I looked up lil gun and find it was developed for the .410 and H110 was or can be used for the .410.

With a chronograph one could probaly develope a load for the whisper. It would seem for those shooting a ten inch barrel that it would be better tha H110.

Lone Star · « **Reply #14 on:** September 05, 2007, 02:34:57 PM »

Lil'Gun is only a bit faster than H110 - when it is faster. In some cases it is actually slower than H110. Powders faster than H110 do not work as well in 10" .300 Whispers if velocity is the goal. Both Sierra and Hornady data show H110/W296 giving the fastest speeds with 110 and 130 grain bullets; all faster powders gave lower velocities. It is a common misconception that faster powders are better in short barels. As far as velocity is concerned, the usual case is that the powders that give the highest velocity in a long barrel also give the highest in a short one.

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Steve P · « **Reply #15 on:** September 06, 2007, 09:34:12 AM »

I use WSR primers in my whisper. I don't use CCI primers in my Contenders any more. Softer than the others and periodically caused problems. Quit CCI primers and problems went away. Still use CCI BR4s in my .223 and .222 rifles. No problems there.

I have heard of good luck with little gun. I did not have the accuracy I was looking for when trying to keep the loads mild. As the loads got hotter, the accuracy got tighter, over the bench. I could not keep them steady shooting standing so went back to 296 and tossed the data.

Steve

Ruskin · « **Reply #16 on:** September 07, 2007, 03:38:45 AM »

I have not had good luck with accuracy. I have changed to a Nikon scope and have gone to a 130 gr or 110 gr bullet with a stoked charge. I have not been to the range yet.

I would like to see some consistency.

Ruskin · « **Reply #17 on:** September 08, 2007, 08:13:58 AM »

Finally found a round. The 18.5 H110 with 125 remington. At 31 yards I was putting through same hole. I had shot the 110 Gr RN and was not impressed.

will wait for a day to try the 100 yard range.

Ruskin · « **Reply #18 on:** September 11, 2007, 05:05:41 AM »

I shot the 100 Yard. I was in a hurry due to closing of range. I will need to adjust scope.

With 18.5/125 gr. I am about an inch and a half at 31 yards. At 100, I was approximately 3" high. All from a 16.5 barrel.

I am wondering where should zero be. What kind of trajectory? I am thinking that this should approach 2000FPS. Would this be considered a lob vs a flat shooter?

Jim Stacy · « **Reply #19 on:** September 14, 2007, 07:04:06 PM »

My TC 10" liked the 18.5 H110/125 Sierra very much. My 10" SSK also likes the load but not as accurate , probably due to 1:8 twist. I have heard the Speer 125 TNT is a pretty soft bullet and should work in the 300. They are fun little rounds and Lone Star is correct how powder works different in different rounds. In a 357 mag :Little Gun is about 5% slower than H110 but that's why you start low and work up loads, not at max and work down.