Max speed with 110 gr bullet?

[d-mon]

Hello all of you whisper fans,
You would be able to tell me what are the fastest velocities you can get in your 300 whisper rifles?
Or who would like to run a small test for me? (but please , do not blow up yourself)
Preferably in a bolt action or single shot rifle, with a barrel of 18" minimum.

Thank you for your answers.
ND

[TORSTEIN]

I`II do it if you can live with 16" barrel + semi. But it will be with norma and vihtavuori powder!!!!
Reply if you think thats okayyyyyyyyyyy.
Then give me a couple of days to run test. Is busy at work.
Have sierra 110 hp & hornady 110 v-max.

[d-mon]

Hello Torstein,
Thank you very much for your offer. That should be ok for me to strart with.Any of the two bullet should do , but preferably with vhitavuori powder if it is possible.
Thank you very much.
See you soon.
And please, be carefull with your load development!!!

Nicolas

[TORSTEIN]

AR-15
Model1Sales upper. 16" barrel w/silencer. 1-8 twist.
No modification to gas block.

Case: 221fb/300W
Case overall length: 34.6mm/1.362"
Primer: Winchester small rifle(WSR)
Case overall length: 34.4mm/1.362"
Bullet : Hornady v-max 110gr. C.O.L.= 53.7mm/2.114". pn: 23010 (Max c.o.l. in my chamber is: 56.6mm/2.228")
Bullet : Sierra HP 110gr. C.O.L.= 51.2mm/2.015". pn: 2110 (Max c.o.l. in my chamber is: 54.1mm/2.130")

Vihtavuori
Powder
VN105. A1(ref) 14.0grain. 2073f/s. 9.595mm/0.3777" pressure ring. Hornady v-max. 110gr.
VN105. A2(ref) 15.0grain. 2143f/s. 9.598mm/0.3779" pressure ring. Hornady v-max. 110gr.
VN105. A3(ref) 16.0grain. 2184f/s. 9.612mm/0.3784" pressure ring. Hornady v-max. 110gr.
VN105. A4(ref) 16.5grain. 2248f/s. 9.620mm/0.3787" pressure ring. Hornady v-max. 110gr.
VN105. A5(ref) 17.0grain. 2278f/s. 9.637mm/0.3794" pressure ring. Hornady v-max. 110gr.
VN105. A6(ref) 17.5grain. 2302f/s. 9.645mm/0.3797" pressure ring. Hornady v-max. 110gr. (almost full case)


VN110. B1(ref) 18.0grain. 2192f/s. 9.584mm/0.3773" pressure ring. Hornady v-max. 110gr.
VN110. B2(ref) 19.0grain. 2222f/s. 9.598mm/0.3779" pressure ring. Hornady v-max. 110gr.
VN110. B3(ref) 19.5grain. 2306f/s. 9.602mm/0.3780" pressure ring. Hornady v-max. 110gr. (full case)

VN110. C1(ref) 19.5grain. 2285f/s. 9.598mm/0.3779" pressure ring. Sierra HP 110gr. (full case)


VN120. D1(ref) 20.5grain. 2116f/s. 9.540mm/0.3756" pressure ring. Hornady v-max. 110gr. (full case)

Note: Load A1&2 do not cycle my gun.

The f/s is for one shot only. I should have fired more rounds to get a better indication of f/s & pressure ring, but this is what we have today.
I have not tested this loads for precision, therefor you may fiddle whith the c.o.l. (watch your max c.o.l.). Also watch your pressure, if you seat the bullet deeper in the case.

Study the picture(attachment) of primers related to my reference(ex. A1).

How to judge the pressure in the case? I have included measurement of "pressure ring" for each powder and increasement in load.
For VN105 i feel A5 & A6 is "borderline" when it comes to pressure.
Look at the different pressure ring measurements, and you will see that VN110 has a lower pressure than VN105 + "more speed".

I will soon post a thread named: How to judge pressure in the case, not only looking at primers.
Here I will try to explain what to do.

Take care my friend.

[d-mon]

Dear Torstein,
Sorry for coming back to you so late, I juste come back from holidays in egypt.
Thank you very much for the test that you have conducted and these precious informations. It seems that breaking the 2450fps barrier is going to be hard with that calibre! Anyway, it should still be fun and cheap to use specialy with subsonic loads.
See you soon.

Nicolas

[Gos]

Not hard, just a different wildcat.
My best out of a 16" barrel AR15 with a:
125gr. Sierra Spitzer is 2,550 fps.
150gr. Speer RNSP is 2,300 fps.

Gos.