ALANWOODS wrote:Thanks for your suggestions, I have purchased it at Rs.15500.00 and only after I joined this blog I realized that I have paid more, now nothing can be done about it. I will put up more details I have ordered a bipod too from an Online site called "Wish" rates are very low and that along with the Bushnell scope and is expected any day. The trigger is consistent and I am happy. Okay I shall use 19 - 21 grain pellets.
Alan Woods
Do tell us about groupings & power delivered at 70-100m distances. Also a table of kinetic energy & velocity at muzzle with different pellets would be a great help in gauging its performance. You can use Chrono Connect & Chairgun apps on your android phone for that if you wish. Anxiously awaiting results!
Basu wrote:To my mind , 19-21 gr.pellet will be little too heavy for this AR as fps would be low.
A =< 15 gr.would be better choice.
Heavy pellet will obviously negotiate better with wind yet fall will be more at longer distance.
Sir as per 'Sardarji' (AARMR techie), the current model is throwing 16gr pellets at 750fps; though after his little 'oil doped video', I'm skeptical. But going by Alan Woods' review, seems his claims were right! That's why I requested Alan for the detailed data.
I think with that kind of power we can afford to use heavier pellets for their higher ballistic coefficients & power delivered at long ranges where accuracy & grouping is mostly determined by winds instead of gun itself.. I did some theoretical calculations on Chairgun & found the following pellet descriptions keeping a constant energy of 20fpe approx:
16gr, BC 0.027, 750fps, 20fpe, 5mph cross wind:
At 50yd- 600fps, 13.25fpe, 8.5" LoD drop, 2" drift
At 75yd- 550fps, 10.75fpe, 22.5" LoD drop, 4.5" drift
At 100yd- 500fps, 8.75fpe, 41.5" LoD drop, 8.5" drift
21.1gr, BC 0.036, 650fps, 19.75fpe:
At 50yd- 560fps, 14.50fpe, 12.5" LoD drop, 1.5" drift
At 75yd- 520fps, 12.60fpe, 26" LoD drop, 3.75" drift
At 100yd- 480fps, 10.75fpe, 51" LoD drop, 7" drift
As you can see, the LoD drops are comparable out to 75yds but wind effect is significantly more pronounced. Only in the last 25yd the LoD difference becomes too much. The drop can be calculated. The wind however is one fickle thing!
GNV wrote:Here are the latest groups shot with my Hurricane with different pellets. All are 5 shot groups and range is 12 yards.
Is your gun MOD-15 T or MOD-15 ?
I declare thee, the IFGian Sniper of the week!
I guess he has received the latest model with HDPE guides, new spring & optimized compression tube dias.. Sardarji was busy messing with it for weeks!
